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-3x-2x = 5-4
-5x=1 I:(-5)
x = -1/5
----------------------
b 2x-7=2(3-x)
2x-7 = 6-2x
2x+2x = 6+7
4x = 13 I:4
x = 13/4
x = 3 1/4
-------------------------
c -3(2x-4)=6x
-6x+12=6x
-6x-6x=-12
-12x = -12 I:(-12)
x =1
-----------------------------------
4-3x=2x+5
-3x-2x=5-4
-5x=1 |:(-5)
b)
2x-7=2(3-x)
2x-7=6-2x
2x+2x=6+7
4x=13 |: 4
c)
-3(2x-4)=6x
-6x+12=6x
-6x-6x=-12
-12x=-12 |:(-12)
x=1