Question

x+20+2x+x=180 determine o valor do triângulo

Answer 1

X+20+2x+x=180    

X+x+2x= 180-20 

4x=160

x= 160/4

x=40

Answer 2

X+20+2x+x=180
X+2x+x=180-20
4x=160
X=160÷4
X=40