Question

calcule x e determine o valor dos angulos adjecentes A e B
3x-30+x+10 =180

Answer 1

3x-30+x+10 = 180
4x - 20 = 180
4x - 20 - 180 = 0
4x - 200 = 0
4x = 200
x = 200/4 
x = 50.