Question

the measure of two complementry angle are (2x-7)and (x+4).find the value of X

Answer 1

(2x-7)+(x+4)=90
2x-7+x+4=90
3x-3=90
3x=90-3
3x=87
x=87/3
x=29

Answer 2

$2x - 7 + x + 4 = 90 \\ 3x - 3 = 90 \\ x = 87 \div 3 = 29$