pre-algebra 7th grade

[jehumaximiliano]

please calculate -4(2+x)-2(x+3)=4

 

[Deleted member 4993]

please calculate -4(2+x)-2(x+3)=4

I am assuming that by "calculate" - you meant "calculate the value of x in"

First simplify the Left-Hand-Side of the equation using distributive law of multiplication:

-4(2+x) - 2(x+3) = 4

-8 - 4x - 2x - 6 = 4 <<< fixed typo

Now continue....

Please share your work with us, indicating exactly where you are stuck - so that we may know where to begin to help you.

 

[jehumaximiliano]

Thanks!

I tought that this forum is get help not help the "helpers", to start :


-4(2+x)-2(x+3)=4

you made a mistake :

on your first CALCULATION -8-8x is should be -8-4x, please continue CALCULATING the problem, i want to see how you solve it , in the next step is were i do not know
how to add.

thank you

jehumax

 

[Mrspi]

Thanks!

I tought that this forum is get help not help the "helpers", to start :


-4(2+x)-2(x+3)=4

you made a mistake :

on your first CALCULATION -8-8x is should be -8-4x, please continue CALCULATING the problem, i want to see how you solve it , in the next step is were i do not know
how to add.

thank you

jehumax

Actually, WE want to see how you would approach this problem. You've already demonstrated that you can use the distributive properly correctly to eliminate the parentheses...you got this:

-8 - 4x - 2x - 6 = 4

Since the "next step is were i do not know," I'll give you this hint: simplify the left side by combining like terms

After you've done THAT, get the term containing the variable by itself on one side of the equals sign

And FINALLY, get the coefficient of the variable to be 1. To do this, divide both sides by the existing coefficient of the variable (if it is something other than 1.

Here's the complete process, using a DIFFERENT (but similar) problem.

EXAMPLE:

3(2x - 5) - 4(3x + 2) = 1

Step 1: use the distributive property to eliminate the parentheses:

6x - 15 - 12x - 8 = 1

Step 2: simplify the left side by combining like terms:

-6x - 23 = 1

Step 3: get the term containing the variable by itself on one side. To eliminate the "- 23" ADD 23 to both sides of the equation:

-6x - 23 + 23 = 1 + 23
-6x = 24

Step 4: We want the coefficient of x to be 1. It isn't. So, divide both sides of the equation by the current coefficient of x, which is -6. We do this because (-6) / (-6) is 1.

(-6x)/(-6) = 24 / (-6)

x = -4

THEN, be sure you check your answer. Substitute the value you got for x into the original equation and see if the original equation is then true.

Original equation: 3(2x - 5) - 4(3x + 2) = 1

Substitute -4 for x:
3[2*(-4) - 5] - 4[3*(-4) + 2] = 1

Do the arithmetic, following the order of operations:

3[-8 - 5] - 4[-12 + 2] = 1
3[-13] - 4[-10] = 1
-39 + 40 = 1
1 = 1

It checks.

Now, you follow this same sort of process on your problem.

If you are still having trouble, show us all of your work, so we can see where you might be making an error.

 

[Denis]

-4(2+x) - 2(x+3) = 4
-8 - 8x - 2x - 6 = 4

In da korner...and now!

 

[Denis]

please calculate -4(2+x)-2(x+3)=4

Much easier if you multiply by -1 first:
4(2+x) + 2(x+3) = -4
8 + 4x + 2x + 6 = -4
carry on...

 

[jehumaximiliano]

Thank you very much!

you have been an excellent help, great description. Thank you again.

jehu maximiliano

 

[mmm4444bot]

I tought that this forum is get help not help the "helpers"

You 'tought' wrongly !

Since English is not your primary language, you should expect requests for clarification often.

Your use of the verb "to calculate" is ambiguous. A proper instruction in this exercise is "Solve for x".

Cheers ~ Mark