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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

Respuesta :

bratzjs1

Answer:

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

Answer:

b

Step-by-step explanation:

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