Rozwiązane

a ) 2(3x + 2) = x + 6

b ) 2(x + 1) + x = 4x

c ) 6x + 2 = – 4

d ) 8 + 2x = 11

e ) 3x + 1 = x + 5

f ) 2x – 3(x + 1) = 4x + 8

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Odpowiedź :

a) 2(3x + 2) = x + 6
4 x 3x = x + 6 | -6
-2 x 3x = x |+2
3x = x + 2 | -x
2x = 2 |:2
X = 1

B) 2(x + 1) + x = 4x
3 + 2x = 4x |-2x
3 = 2x |:2
X = 1,5

C) 6x + 2 = -4 |-2
6x = -6 |:6
X = -1

D) 8 + 2x = 11 |-8
2x = 3 |:2
X= 1,5

E) 3x + 1 = x + 5 |-1
3x = x + 4 |-x
2x = 4 |:2
X= 2

F) 2x - 3(x+1) = 4x+ 8
3x - 2 = 4x + 8 |+2
3x = 4x + 10 | -4x
-x = 10