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a) -3+2x-6=3-4x
b) 7x+2=5+3x+9
c) -5x+12+x=2x-12
d) 2x-6+12-3x=5
e) 3x-12-4x+10=-4
f) 2x+8-5-15=2
g) -2x-6+8x+12=-6
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Odpowiedź :

a) -3+2x-6=3-4x

-9 + 2x = 3 - 4x

2x + 4x = 3 + 9

6x = 12

x = 2

b) 7x+2=5+3x+9

7x + 2 = 3x + 14

7x - 3x = 14 - 2

4x = 12

x = 3

c) -5x+12+x=2x-12

-4x + 12 = 2x - 12

-4x - 2x = -12 - 12

-6x = -24

x = 4

d) 2x-6+12-3x=5

-x + 6 = 5

-x =   5 - 6

-x = -1

x = 1

e) 3x-12-4x+10=-4

-x - 2 = -4

-x = -4 + 2

-x = -2

x = 2

f) 2x+8-5-15=2

2x - 12 =2

2x = 2 + 12

2x = 14

x = 7

g) -2x-6+8x+12=-6

-2x + 8 + 12 = 0

6x + 12 = 0

6x = -12

x  = -2