felipe0387 29/08/2017 A)2x + x + 90 = 1803x = 180 - 90x = 90 / 3x = 30b)3x + 5x + 4x = 18012x = 180x = 180 / 12x = 15c)x + 20 + x + 40 + x - 30 = 1803x + 30 = 1803x = 180 - 30 x = 150 / 3x = 50d)x + 10 + 3x + 90 = 1804x = 180 - 100x = 80 / 4 x = 20
felipe0387
A)
2x + x + 90 = 180
3x = 180 - 90
x = 90 / 3
x = 30
b)
3x + 5x + 4x = 180
12x = 180
x = 180 / 12
x = 15
c)
x + 20 + x + 40 + x - 30 = 180
3x + 30 = 180
3x = 180 - 30
x = 150 / 3
x = 50
d)
x + 10 + 3x + 90 = 180
4x = 180 - 100
x = 80 / 4
x = 20