Question

resolva a esquacao
b)2x.+x+7=53
c)12x-10x-3=4
d)x-2x-5=12
e)3(x+1)=13
f)4(2-x)-2x=18
g)7x-2(2x+2)=15
h)2(x-2)-x=1

Answer 1

b) 2x + x + 7 = 53

2x + x = 53 - 7
3x = 46
x = 46/3
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c) 12x - 10x - 3 = 4

12x - 10x = 4 + 3
2x = 7
x = 7/2
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d) x - 2x - 5 = 12

x - 2x = 12 + 5
-x = 17 . (-1)
x = -17
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e) 3.(x + 1) = 13

3x + 3 = 13
3x = 13 - 3
3x = 10
x = 10/3
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f) 4.(2 - x) - 2x = 18

8 - 4x - 2x = 18
-4x - 2x = 18 - 8
-6x = 10 . (-1)
x = -10/6
x = -5/3
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g) 7x - 2.(2x + 2) = 15

7x - 4x - 4 = 15
7x - 4x = 15 + 4
3x = 19
x = 19/3
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h) 2.(x - 2) - x = 1

2x - 4 - x = 1
2x - x = 1 + 4
x = 5