Solve the system of equations by substitution. Your answer should be given as an ordered pair like this (x, y). Round your answers to the nearest tenth.

Question

y=-2+7x
10x-7y=209

Answer 1

so, make the substitution:

10x - 7(-2+7x) = 209
10x + 14 - 49x = 209
-39x = 195
x = -5
y=-2+7(-5) = -37