Question

Solve each system of the equations

Answer 1

a. y = -3

b. x = -2.5

y = -4

Explanation:

a. 2x - 4y = 20

x = 4

2(4) - 4y = 20

8 - 4y = 20

-4y = 12

y = -3

b. y = 6x + 11

2x - 3y = 7

2x - 3(6x + 11) = 7

2x - 18x - 33 = 7

-16x = 40

x = -2.5

y = 6(-2.5) + 11

y = -15 + 11

y = -4