Question

determine o valor dos termos desconhecido do triângulo

Answer 1

4x-40+x+20+x=180
4x+x+x=180+40-20
6x=220-20
6x=200
x=200/6
x= 100/3

4x-40= 4.100/3 -40 = 400/3-40 = 280/3
x+20 = 100/3+20= 160/3
x = 100/3