Answer:
x = -3
Step-by-step explanation:
16x − 4 + 5x = -67
Combine like terms
21x -4 = -67
Add 4 to each side
21x-4+4 = -67+4
21x = -63
Divide each side by 21
21x/21 = -63/21
x = -3
Answer:
x = 2
Step-by-step explanation:
Plug in m/4 into the equation:

Solve the parentheses in the equation:



Your equation should now look like this:

The answer is
D.