Question

Solve the systems of equations 3x-7y=9 and 3x-9y=3 by combining the equations

Answer 1

Answer:

(10,3)

Step-by-step explanation:

Solve for the first variable in one of the equations, then substitute the result into the other equation.

Answer 2

Answer: y = 6, x = 5

Step-by-step explanation:

3x + 7y = 57 −6x + 2y = −18

2*(3x + 7y = 57)−6x + 2y = −186x+14y=114−6x+2y=−1816y=96y = 6

3x + 7(6) = 57 ; 3 x = 57 – 42 ; 3x = 15 ; x = 5

CHECK:−6(5) + 2(6) = −18 ; -30 + 12 = - 18 ; -18 -= -18

CORRECT! Solution Set: y = 6, x = 5