A. 5x=1 B. 3=15 C. -4x=-20 D.60=10x

So we plug 5 in for x to each

a. 5(5)=25=1? nope

b.3=15 No x, this is just a wrong statement.

c. -4(5)=-20=-20 CHECK

d. 10(5)=50=60 NOPE

SO, our answer is C.

Let me know if you have any questions :)

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