Question

2(45° ) + x = 180°

solve for x

Answer 1

x = 90

Explanation:

Multiply 45 by 2:

2(45) + x = 180

90 + x = 180

Subtract 90 from both sides:

90 + x = 180

-90 - 90

___________

x = 90

Answer 2

x = 90

Explanation:

2(45° ) + x = 180°

Distribute

90 +x = 180

Subtract 90 from each side

90+x-90 =180-90

x = 90