Answered

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What value of x will make these two expression equivalent?

-3/7 and x/21
A X=-3 B x=7 Cx=9 Dx=-9

Sagot :

rspill6

Answer:

D.  x = -9

Step-by-step explanation:

We want -(3/7) = (x/21)

Cross multiply:  7x = - 63

x = - 9

Check:

Does (-9/21) = -(3/7)?

(-9/21) reduces to -(3/7)   YES
D because you would cross multiply 7 and x which would give u -63 making x = -9. -9/21 simplifies down to -3/7.
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