Question

Solve the system of equations by substitution. (write your answer as an ordered pair) −5x + y = −2 −3x + 6y = −12 html editor keyboard shortcuts

Answer 1

 −5x + y = −2 ----------------- (1)
 −3x + 6y = −12 --------------(2)

From (1):

-5x + y = -2
y = 5x - 2 --------------- sub into (2)
-3x + 6 (5x - 2) = - 12
-3x + 30x - 12 = -12
27x = -12 + 12
27x = 0
x = 0 ---- sub into (1)
-5(0) + y = -2
0 + y = -2
y = -2

answer: (0, -2)