A. 10
−1/2x+2=−x+7 Step 1
−1/2x+2+x=−x+7+x Step 2
1/2x+2=7 Step 3
1/2x+2−2=7−2 Step 4
1/2x=5 Step 5
2*(1/2x)=(2)*(5) Step 6
ANSWER: x = 10 Step 7
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