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3+2=x+x
5=2x
2,5=x
b.
-x-x=-2-3
-2x=-5
x=-5/-2
x=5/2
b.1/3(x+1)=2
1/3x+1/3=2
1/3x=2-1/3
1/3x=5/3
x=5/3 : 1/3
x=5