alleryStart learning →From 5x+7=2x−8, a pupil writes 3x=−8+7. What should the right side be?
A8+7
B−8−7
C−8÷7
D8−7
Answer & Solution
Correct answer: B. −8−7
Subtract 2x and 7 from both sides. The correct equation is 3x=−8−7; moving +7 to the right changes its sign.
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