3/7x + 5/9y = 27 1/9x +2/7y = 7 I need help solving this
E ejsgran New member Joined Oct 16, 2009 Messages 1 Oct 16, 2009 #1 3/7x + 5/9y = 27 1/9x +2/7y = 7 I need help solving this
W wjm11 Senior Member Joined Nov 13, 2004 Messages 1,417 Oct 16, 2009 #2 3/7x + 5/9y = 27 1/9x +2/7y = 7 Click to expand... Your problem is unclear. Use parentheses to state the problem correctly. Is the first equation (3/7)x + (5/9)y = 27, or is it 3/(7x) + 5/(9y) = 27? Fix the second equation also.
3/7x + 5/9y = 27 1/9x +2/7y = 7 Click to expand... Your problem is unclear. Use parentheses to state the problem correctly. Is the first equation (3/7)x + (5/9)y = 27, or is it 3/(7x) + 5/(9y) = 27? Fix the second equation also.
S soroban Elite Member Joined Jan 28, 2005 Messages 5,586 Oct 16, 2009 #3 Hello, ejsgran! \(\displaystyle \begin{array}{ccc}\frac{3}{7}x + \frac{5}{9}y &= & 27\\ \\[-3mm] \frac{1}{9}x + \frac{2}{7}y & =& 7 \end{array}\) Click to expand... \(\displaystyle \text{Multiply both equations by 63: }\;\begin{array}{ccc} 27x + 35y &=& 1701 \\ 7x + 18y &=& 441 \end{array}\) \(\displaystyle \text{Now use your favorite method . . . }\)
Hello, ejsgran! \(\displaystyle \begin{array}{ccc}\frac{3}{7}x + \frac{5}{9}y &= & 27\\ \\[-3mm] \frac{1}{9}x + \frac{2}{7}y & =& 7 \end{array}\) Click to expand... \(\displaystyle \text{Multiply both equations by 63: }\;\begin{array}{ccc} 27x + 35y &=& 1701 \\ 7x + 18y &=& 441 \end{array}\) \(\displaystyle \text{Now use your favorite method . . . }\)
