algebra help??

[hrb987]

can someone show me how to solve problems like this?

3(2x+6)-3

 

[pappus]

can someone show me how to solve problems like this?

3(2x+6)-3

1. What do you mean by "solve"? There isn't anything to solve.

2. Your term can be re-written in two different ways:

a) Expand the bracket an collect like terms.

b) Factor out 3 and collect like terms in the bracket.

 

[mathwannabe]

can someone show me how to solve problems like this?

3(2x+6)-3

Here is how you can "solve" it:

$\displaystyle 3(2x+6)-3=$

$\displaystyle =6x+18-3=$

$\displaystyle =6x+15$

(Note >> $\displaystyle 3(2x+6)$ << use the distributive law to get rid of the brackets (distributive law: >> $\displaystyle a(b+c)=ab+ac$ << ) >> $\displaystyle 3(2x+6)=3(2x)+3(6)=6x+18$ <<
(Now we have >> $\displaystyle 6x+18-3$ <<. Combine like terms. Terms 18 and -3 are like terms. >>$\displaystyle 18 + (-3)=18-3=15$