Question

Use substitution to solve the following system of equations. What is the value of y?

6x + 2y = 4
3x - 5y = 44

y = 7
y = -4.5
y = -7
y = 4.5

Answer 1

y = -7

Explanation:

y = 2 - 3x

3x - 5y = 44

3x - 5(2 - 3x) = 44

3x - 10 + 15x = 44

18x - 10 = 44

18x = 54

x = 3

y = -7