Question

Solve by substitution
4x + 7y = 1
y = -2x-7

Answer 1

4x + 7y = 1

y = -2x-7

4x+7(-2x-7) = 1

4x-14x-49 = 1

-10x - 49 =1

-10x = 50

x = -5

y = -2(-5)-7

y = 10-7

y = 3

(-5,3)