Question

poderiam me ajudar nessa equação da foto urgente!!!!

Answer 1

b) * mmc (2; 5) = 10

x - 1/2 = 2x/5 + 4
10 × [x - 1/2] = 10 × [2x/5 + 4]
[10x - 5] / 10 = [4x + 40] / 10
10x - 5 = 4x + 40
10x - 4x = 40 + 5
6x = 45
x = 45 / 6
x = 15/2

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c) * mmc(5; 7): 35

x/5 + 5 = x/7 + 8
35 × [x/5 + 5] = 35 × [x/7 + 8]
[7x + 175] / 35 = [5x + 280] / 35
7x + 175 = 5x + 280
7x - 5x = 280 - 175
2x = 105
x = 105 / 2
x = 52,5

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d) * mmc (3; 4) = 12

2x/3 + 3x/4 = 68
12 × [2x/3 + 3x/4] = 12 × [68]
[8x + 9x] / 12 = [816] / 12
8x + 9x = 816
17x = 816
x = 816 / 17
x = 48

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Resposta: b) x = 15/2 + c) x = 52,5 + d) x = 48

Espero ter ajudado;