Question

Find x in this equation

Answer 1

Explanation:

9.

Sum of angles in triangle:

90 + 3x + 11 + 25 = 180

Add like terms:

126 + 3x = 180

Subtract 126 on both sides:

3x = 54

Divide:

x = 18

11.

Supplementary angles:

45 + 3x = 180

Subtract 45:

3x = 135

Divide 3:

x = 45