Question

90=х+(х+20)+2*х чему равен х

Answer 1

x + (x + 20) + 2*x = 90
x + x + 20 + 2x = 90
4x + 20 = 90
4x = 90 - 20
4x = 70
x = 17,5

Answer 2

4х+20=90

Answer 3

x+(x+20)+2*x=90
x+x+20+2x=90
4x+20=90
4x=90-20
4x=70
x=70:4
x=17.5