Question

como que fas essas

56.x+56=42.x+42

25.x+5+5.x=40-5

291.x+432=191.x-68

6(y+4)=2(3+y)+2

3(y-6)=-2.y+79

Answer 1

56x + 56 = 42x + 42
56x - 42x = 42 - 56
14x = - 14
x = - 14/14
x = - 1

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25x + 5 + 5x = 40 - 5
25x + 5x + 5 = 35
30x = 35 - 5
30x = 30
x = 30/30
x = 1

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291x + 432 = 191x - 68
291x - 191x = - 68 - 432
100x = - 500
x = - 500/100
x = - 5

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6.(y + 4) = 2.(3 + y) + 2
6y + 24 = 6 + 2y + 2
6y + 24 = 8 + 2y
6y - 2y = 8 - 24
4y = - 16
y = - 16/4
y = - 4

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3.(y - 6) = - 2y + 79
3y - 18 = - 2y + 79
3y + 2y = 79 + 18
 5y = 97
y = 97/5

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