Question

Gente me ajudem a resolver essas contas: Coloquem o passo a passo

2x+3x+90=180
y+90+40=180
2x-30=x+15
5x-10+12x+3=180
6x+3x=180
4x+1+2x-7=90
5x+18+7x-12=90
6x-7+4x-1+2x+8=180

Answer 1

2x + 3x + 90 = 180
5x + 90 = 180
5x = 180 - 90
5x = 90
x = 90/5
x = 18
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y + 90 + 40 = 180
y + 130 = 180
y = 180 - 130
y = 50
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2x - 30 = x + 15
2x - x = 15 + 30
x = 45
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5x - 10 + 12x + 3 = 180
5x + 12x - 10 + 3 = 180
17x - 7 = 180
17x = 180 - 7
17x = 173
x = 173/17
x = 10,17 aproximadamente
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6x + 3x = 180
9x = 180
x = 180/9
x = 20
============================
4x + 1 + 2x - 7 = 90
4x + 2x + 1 - 7 = 90
6x - 6 = 90
6x = 90 + 6
6x = 96
x = 96/6
x = 16
============================
5x + 18 + 7x - 12 = 90
5x + 7x + 18 - 12 = 90
12x + 6 = 90
12x = 90 - 6
12x = 84
x = 84 / 12
x = 7
=============================
6x - 7 + 4x - 1 + 2x + 8 = 180
6x + 4x + 2x - 7 - 1 + 8 = 180
10x + 2x - 8 + 8 = 180
12x = 180
x = 180 / 12
x = 15