Question

Substitution 2x - 3y + = -45, x + 6y = 45

Answer 1

y = 9

x = -9

Explanation:

2x - 3y + = -45

x + 6y = 45, x = 45 - 6y

substitute for x:

2(45 - 6y) - 3y = -45

90 - 12y - 3y = -45

combine like terms:

90 - 15y = -45

15y = 135

divide both sides of the equation by 15:

y = 9

x = 45 - 6(9) = -9