e) 15 = x + 20
f) 9x – 2 = 4x + 18
g) 2x – 10 + 7x + 10 = 180
h) 7y - 10 = y + 50
i) 4x – 18+ 3x = 10
j) 2x + 5+x+ 7 = 18
k) 5x - 91 = 4x - 77
Respostas
Resposta:
e) 15 = x + 20
-x = 20 - 15
-x = 5
x = -5
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f)9x-2=4x+18
9x-4x=18+2
5x=20
X=20÷5
X=4
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g)2x-10+7x+10=180
2x+7x=180+10-10
9x=180
x= 180
9
x=20
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H)7y - 10 = y + 50
7y - y = 50 + 10
6y = 60
y = 60/6
y = 10
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I)4x-18+3x=10
4x+3x=10+18
7x=28
x=28/7
x=4
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J)2x+5+x+7=18
3x= 18-7-5
3x= 6
x=6/3
x=2
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K)5x - 91= 4x - 77
5x-4x=-77+91
X=14
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AI ESTÁ! BONS ESTUDOS!