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-5x = - 10 | : (-5)
x = 2
b) 2x - 2 = 7 - x | + 2
2x = 9 - x | + x
3x = 9 | :3
x = 3
c) 10 = 4 - 2x | + 2x
10 + 2x = 4 | - 10
2x = -6 | : 2
x = -3
PS Wszystko zrobione jest idealnie. Z gory dziekuje bardzo za naj :))
-3-2x=-10
-5x=-10 / ;-5
x=2
b) 2x-2=7-x/+x
2x+x-2=7/+2
3x=7+2
3x=9 /3
x=3
c)10=4-2x/-4
10-4=-2x
6=-2x/:-2
-3=x