Question

Examine the system of equations.

y = –3x – 2,

y = 7

The value of x is .
The solution to this system of equations is .

Answer 1

x = -3

(-3,7)

Explanation:

y = –3x – 2,

y = 7

We know the value of y, y=7

Substitute into the first equation

7 = –3x – 2

Add 2 to each side

7+2 = –3x – 2+2

9 = -3x

Divide each side by -3

9/-3 = -3x/-3

-3 = x