−1/2(x+2)+11/2x=3 -1/2x-1+11/2x=3 -1/2x+11/2x-1=3 5x-1=3 5x=3+1 5x=4 X=4/5 To check you substitute and needs to equal both sides −1/2(4/5+2)+11/2(4/5)=3 -7/5+22/5=3 -7+22/5=3 15/5=3 3=3 it check
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