determine o valor de x:
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a)20+3x+x=180
4x=180-20
4x=160
x=160/4
x=40
b)38+x+x=180
2x=180-38
2x=142
x=142/2
x=71
c)3x+4x+50=180
7x=180-40
7x=140
x=140/7
x=20
d)90+50+2x=180
2x=180-90-50
2x=40
x=20
4x=180-20
4x=160
x=160/4
x=40
b)38+x+x=180
2x=180-38
2x=142
x=142/2
x=71
c)3x+4x+50=180
7x=180-40
7x=140
x=140/7
x=20
d)90+50+2x=180
2x=180-90-50
2x=40
x=20
fabaian:
voce sabe a (e)
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