Question

5(3-x)=4x+18

9x-3(2x+2)=15

-5(-x-4)=-5

2x-3=7-2(2x-13)

Ajudem

Answer 1

5 ( 3 - x ) = 4x + 18
15 - 5x = 4x + 18
- 5x - 4x = 18 - 15
- 9x = 3 . ( - 1 )
9x = - 3
x = - 3/9
x = - 1/3

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9x - 3 ( 2x + 2 ) = 15
9x - 6x - 6 = 15
9x - 6x = 15 + 6
3x = 21
x = 21/3
x = 7

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- 5 ( - x - 4 ) = - 5
5x + 20 = - 5
5x = - 5 - 20
5x = - 25
x = - 25/5
x = - 5

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2x - 3 = 7 - 2 ( 2x - 13 )
2x - 3 = 7 - 4x + 26
2x + 4x = 7 + 26 + 3
6x = 36
x = 36/6
x = 6

Espero ter ajudado !!! :)