Solve the system of equations using elimination.

15q - 4r = 62

5q + 8r = 86

A. q = - 7, r = - 6

B. q = 6, r = 7

C. q = - 7, r = - 7

D. q = 6, r = 6

q = 6

r = 7

Step-by-step explanation:

Multiply 1st column by - 2:

-30q+8r=-124

5q+8r=86

Subtract 2nd column from the first column:

-35q = - 210

Solve for q:

q=6

Subtract q=6 by any of the two equations, so:

-30q+8r=-124

-30*6+8r=-124

Solve for r:

r=7