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

well there are two answers for that.

1: you need 120 ones then that will equal up to 120.

2: you could also do one 100 and 2 tens.

those are the answers that i have thought of.

i got 10.28 but that rounds up to 10.3