Question

Resolva as seguintes equações do 1° grau:
A) 2x+4x+10-6=3x+8-6
B) 8(x+6)+2x+28=2(x+6)-18
C) 3x+2x+15+8=2x+5+6
D) 4x+3+5+8=5x+18+4-2x
E) 7(x+8)+2x+35+8= 6x+15+8-6

Answer 1

A) 2x + 4x + 10 - 6 = 3x + 8 - 6

6x + 4 = 3x + 2
6x - 3x = 2 - 4
3x = -2
x = -2/3
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B) 8(x + 6) + 2x + 28 = 2(x + 6) - 18

8x + 48 + 2x + 28 = 2x + 12 - 18
10x + 76 = 2x - 6
10x - 2x = -6 - 76
8x = -82
x = -82/8
x = -41/4
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C) 3x + 2x + 15 + 8 = 2x + 5 + 6

5x + 23 = 2x + 11
5x - 2x = 11 - 23
3x = -12
x = -12/3
x = -4
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D) 4x + 3 + 5 + 8 = 5x + 18 + 4 - 2x

4x + 8 + 8 = 3x + 22
4x + 16 = 3x + 22
4x - 3x = 22 - 16
x = 6
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E) 7(x + 8) + 2x + 35 + 8 = 6x + 15 + 8 - 6

7x + 56 + 2x + 43 = 6x + 23 - 6
9x + 99 = 6x + 17
9x - 6x = 17 - 99
3x = -82
x = -82/3