Question

Me ajudem a responder essas equacoes 5x+7=4x+10
3x-4=2x+8
7x-28=2x+8
4x--1=3x-3
6x+10=3x-5
18x-100=8x+200
3x-8=2x+10
8x-3=5x+21
7x-21=3x+7
10x-137=9x-37

Answer 1

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5x + 7 = 4x + 10
5x - 4x = 10 - 7
x = 3

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3x - 4 = 2x + 8
3x - 2x = 8 + 4
x = 12

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7x - 28 = 2x + 8
7x - 2x = 8 + 28
5x = 36
x = 36/5

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4x - 1 = 3x - 3
4x - 3x = - 3 + 1
x = - 2

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6x + 10 = 3x - 5
6x - 3x = - 5 - 10
3x = - 15
x = - 15/3
x = - 5
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18x - 100 = 8x + 200
18x - 8x = 200 + 100
10x = 300
x = 300/10
x = 30

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3x - 8 = 2x + 10
3x - 2x = 10 + 8
x = 18
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8x - 3 = 5x + 21
8x - 5x = 21 + 3
3x = 24
x = 24/3
x = 8

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7x - 21 = 3x + 7
7x - 3x = 7 + 21
4x = 28
x = 28/4
x = 7

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10x - 137 = 9x - 37
10x - 9x = - 37 + 137
x = 100

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