Question

If 3x+18° and 2x+25° are supplementary, find the value of x.

Answer 1

3x + 18 + 2x + 25 = 180
5x + 43 = 180
5x = 180 - 43
5x = 137
x = 137/5
x = 27.4

Answer 2

Hi ,

Let a and b are two supplementary

angles

a = 3x + 18°

b = 2x + 25°

a + b = 180°

3x + 18 + 2x + 25 = 180°

5x + 43 = 180

5x = 180 - 43

5 x = 137

x = 137/5

x = 27.4°

I hope this helps you.

: )