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-2x+1=4
-2x=4-1
-2x=3
x=-1,5
2(x+1)=x
2x+2=x
2x-x=-2
x=-2
2t-(3t+1)=6
2t-3t-1=6
2t-3t=6+1
-t=7
t=-7
1-4=-2x
(-3)=-2x
x=-1,5
2. 2(x+1)=x
2x+2=x
2x-x=2
x=2
-2x+1=4
-2x=3 //÷-2
x=-1½
2(x+1)=x
2x+2=x
2x-x=-2
x=-2
2t-(3t+1)=6
2t-3t=6+1
-t=7 //×-1
t=-7