How do you solve the system of equations 7x - 9y = 29 and 7x + 2y = - 15?
1 Answer
Mar 17, 2017
x = -1
y= -4
(-1, -4)
Explanation:
Subtract the like terms and, since the 7x's cancel out,
you're left with
-11y = 44
Divide both sides by -11 to get:
Plug this value into one of the equations to get x, like this: