Question

Select all the equations where c=9 is a solution. Choose 2 answers:

A. 4 - c =5
B. 20 = 14 + c
C. 15 = c - 6
D. C/3 = 3
E. 36 = 4c

Answer 1

D and E

Explanation:

Answer 2

D and E

Explanation:

A.

`\sf 4-c=5`

`\sf 4-c-4=5-4`

`\sf -c=1`

`\sf \cfrac{-c}{-1}=\cfrac{1}{-1}`

`\sf c=-1`

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B.

`\sf 20 = 14 + c`

`\sf 14+c=20`

`\sf 14+c-14=20-14`

`\sf c=6`

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C.

`\sf 15 = c - 6`

`\sf c-6=15`

`\sf c-6+6=15+6`

`\sf c=21`

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D.

`\sf \cfrac{c}{3}=3`

`\sf \cfrac{3c}{3}=3*\:3`

`\boxed{\sf c=9}`

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E.

`\sf 36 = 4c`

`\sf 4c=36`

`\sf \cfrac{4c}{4}=\cfrac{36}{4}`

`\boxed{\sf c=9}`

Therefore, D and E !

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Hope this helps!

Have a great day!