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2x+2=x
2x-x=-2
x=-2
2t - (3t +1) = 6
2t-3t-1=6
2t-3t=1+6
-1t=7/:(-1)
t=-7
-(4 + x ) = 2(3-x)
-4-x=6-2x
-x-2x=-4+6
-3x=2/:(-3)
x=-3/5 (trzy piąte)
3(y+6) - y = 2 (y + 9 )
3y+18-y=2y+18
3y-y-2y=-18+18
y=0
(x-7) - 2(3x+5) = 3
x-7-6x-10=3
x-6x=7+10+3
-5x=20/:(-5)
x=-4