Posted by jaime on Sunday, October 28, 2012 at 9:27pm.
A: 7x+7y=77
B: 20x5y=35

algebra  MathMate, Sunday, October 28, 2012 at 10:17pm
First step: divide each equation by the common factors, i.e. first equation by 7, and second equation by 5.
x + y = 11
4x y = 7
Afterwards, use elimination to solve for x and y.
Hint: there will be fractions in the answers.