Question

the measure of two supplementary angles are (3x+15)° and (2x+5)°. find the value of x.

Answer 1

3x+15+2x+5=180
5x+20=180
5x=160
x=160/5
x=32

Answer 2

supplementary angle =180°
so
3x+15+2x+5=180
5x+20 = 180
5x = 160
x=32