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2x+6=10
2x=4/:2
x=2
b) 3(x-1)+2=8
3x-3+2=8
3x-1=8
3x=9/:3
x=3
c) c) 2(13 - x) - 9 = 1
26 - 2x - 9 = 1
-2x = 1 - 26 + 9
-2x = -25 + 9
-2x = -16/:(-2)
x = 8
d)3(1-x)+2=-7
3-3x+2=-7
-3x=-7-3-2
-3x=-12/:(-3)
x=4
e) 3(x+3)=2(x+4)+1
3x+9=2x+8+1
3x-2x=-9+8+1
x=0
f) 4(3x+2)+5(2x+3)=-(2x+13)
12x+8+10x+15=-2x-13
12x+10x+2x=-13-8-15
24x=-36/:24
x=-1,5
g)4(x-2)-2(x-4)=5(x+1)-3x
4x-8-2x+8=5x+5-3x
4x-2x-5x+3x=5+8+8
0=21 równanie sprzeczne
h) 2(x-4)=2(2x-1)+6(x+1)
h) 2(x - 4) = 2(2x - 1) + 6(x + 1)
2x - 8 = 4x - 2 + 6x + 6
2x - 4x - 6x = 8 - 2 + 6
-8x = 12/:(-8)
x = - 12/8 = - 1,5