Question

If the angles (x + 3) and (2x - 9) are complementary find the value of x.

Answer 1

we know that sum of the complementary angles=90 degrees
i.e.,   x+3+2x-9=90
        3x-6=90
        3x=90+6
        3x=96
        x=32

Answer 2

x+3+2x-9= 90 degrees (since complementary
angles)

3x-6=90
3x=96
x=96/3
therefore , x= 32