Question

Rezolvațile:
b)-4x+10=10-2x
c)-3x +5=-9x+4x
d)2(x+1)=6
e)5(x-1)=2x+7
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Answer 1

Răspuns:

b) -4x +10 =10 - 2x

-4x + 2x = 10 - 10

-2x = 0

x= 0

c) -3x + 5= -9x + 4x

9x - 3x - 4x = - 5

- x = - 5

x = 5

d) 2( x +1) = 6

2x + 2 = 6

2x = 6 - 2

2x = 4

x = 4 : 2= 2

e) 5( x + 1) = 2x +7

5x + 5 = 2x +7

5x - 2x = 7 - 5

3x = 2

x=

$\frac{2}{3}$