Question

Solve by substitution: y = 3x + 4 and y = -2x – 1.

Answer 1

Answer: the answer to x= -1 and y= 1

Answer 2

x = -1

y = 1

Explanation:

y = 3x+4

y = -2x-1

-2x-1 = 3x+4

-5x - 1 = 4

-5x = 5

x = -1

Substitute this x value into 1 of the equations given in the problem:

y = 3(-1)+4

y = -3+4

y = 1