Question

Solve for x to make A||B.
B
3x
A
X =
?
7x
Enter

Answer 1

x = 18

Explanation:

the angle vertically opposite 7x is 7x

making 3x and 7x same- side interior angles summing to 180° , that is

3x + 7x = 180

10x = 180 ( divide both sides by 10 )

x = 18

for A and B to be parallel then x = 18