Question

What is the value of ‘x’?

Answer 1

7

Explanation:

Triangles add up to 180.

90 degrees are already used, leaving us with 90.

90 = 7x + 6 + 4x + 7

Combine like terms.

90 = 11x + 13.

Subtract.

90 - 13 = 77 = 11x

Divide.

77 / 11 = 7.

7 = x