Question

Which equation, when solved, results in a different value of x than the other three? Negative StartFraction 7 over 8 EndFraction x minus three-fourths = 20 Three-fourths + StartFraction 7 over 8 EndFraction x = negative 20 Negative 7 (StartFraction 1 over 8 EndFraction) x minus three-fourths = 20 Negative StartFraction 7 over 8 EndFraction (Negative StartFraction 8 over 7 EndFraction) x minus three-fourths = 20 (Negative StartFraction 8 over 7 EndFraction)

Answer 1

NOT C. I think it's b.

Answer 2

9514 1404 393

Answer:

Negative StartFraction 7 over 8 EndFraction (Negative StartFraction 8 over 7 EndFraction) x minus three-fourths = 20 (Negative StartFraction 8 over 7 EndFraction)

Explanation:

All of the equations are equivalent to ...

-7/8x -3/4 = 20

except the last one, which is ...

-7/8(-8/7)x -3/4 = 20(-8/7)

To make it equivalent, the -3/4 term would also need to be multiplied by (-8/7).