MATH SOLVE

3 months ago

Q:
# Solve the system r + s = -12 4R - 6s = 12 A. -4,-8B -6,-6C -4,8D Infinitely many solutions

Accepted Solution

A:

r + s = -12 so r = -s - 12

4r - 6s = 12

substitute r = -s - 12 into 4r - 6s = 12

4r - 6s = 12

4(-s - 12) - 6s = 12

-4s - 48 -6s = 12

-10s = 60

s = -6

r = -(-6) - 12

r = 6 - 12

r = -6

answer

B -6,-6

4r - 6s = 12

substitute r = -s - 12 into 4r - 6s = 12

4r - 6s = 12

4(-s - 12) - 6s = 12

-4s - 48 -6s = 12

-10s = 60

s = -6

r = -(-6) - 12

r = 6 - 12

r = -6

answer

B -6,-6