3/4(7x-1)-(2x-1-1x/2)=x+3/2
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3/4(7x-1)-(2x-1-1x/2)=x+3/2. =21x-3/4-(2x-1-1x/2)=x+3/2. =21x-3-8x-4-4x/4=x+3/2. =21x-2-8x-4-4x=x+3/2×4. =21x-8x-4x-2-4=(x+3)×2. =9x-6=2x+6. =9x-2x-6-6. =7x-12. x=12/7
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