User163773 User163773

01-03-2022
Mathematics

contestada

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

Respuesta :

rspill6 rspill6

01-03-2022

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

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lizzy6445 lizzy6445

01-03-2022

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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