Question

Find the value of X for which m||n.
A.10
B.12
C.40
D.52

Answer 1

So 48 and (3x+12) are congruent by Alternate Exterior Angles, so all you need to do is equal them to each other and solve.

`48=3x+12`

Firstly, subtract 12 on each side:
`36=3x`

Then divide both sides by 3, and your answer should be
`x=12`, or B.