Question

Decide whether it would be more convenient to solve the system of equations by substitution or elimination. -15x+2y=-6 and 14x+4y=-2

Answer 1

x = 5/22 and y = - 57/44

Explanation:

Elimination:

a) (-15x + 2y = - 6) (-2)

30x - 4y = 12

b) 14x + 4y = -2

a + b = 44x = 10

x = 10/44

x = 5/22

b) 14(5/22) + 4y = -2

35/11 + 4y = -2

4y = -2 - 35/11

4y = 57/11

y = - (57/11)/4

y = - 57/44