Question

a) 4(x+3)-7x=5(2-x)+18

b) 5x-7(x+1)=3(3-2x)+8

c) 2(x+3)+5(1-2x)=2-x-3(x+1)

d)3(x+4)-5(2x+1)=4(x+3)-6(2x+3)+5


Rezolvati in R​

Answer 1

Rezolvare:

a)4(x+3)-7x=5(2-x)+18

4x + 7 - 7x = 10 -5x + 18

-3x + 5x = 28 - 7

2x = 21

x = 21 : 2

x = 10,5

b)5x-7(x+1)=3(3-2x)+8

5x - 7x -7 = 9 - 6x + 8

-2× + 6x = 17 + 7

4x = 24

x = 24 : 4

x = 6

c)2(x+3)+5(1-2x)=2-x-3(x+1)

2x + 6 + 5 - 10x = 2 - x - 3x - 3

- 8x + x + 3x = - 1 - 6 - 5

- 4x = - 12

x= -12 : (- 4)

x= 3

d)3(x+4)-5(2x+1)=4(x+3)-6(2x+3)+5

3x + 7 - 10x - 5 = 4x + 7 - 12x - 18 + 5

- 7x - 4x + 12x = - 6 - 7 + 5

x = - 13 + 5

x = - 8

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