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 divided by 3=3

Answer 1

D,E

Explanation:

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Answer 2

we are given

c=9 is a solution

we will select each options and then verify it

option-A:

`4-c=5`

Subtract both sides 4

`4-c-4=5-4`

`-c=1`

Multiply both sides by -1

`-c*-1=1*-1`

`c=-1`

so, this is FALSE

option-B:

`20=14+c`

Subtract both sides by 14

`20-14=14+c-14`

`6=c`

so, this is FALSE

option-C:

`15=c-6`

Add both sides by 6

`15+6=c-6+6`

`21=c`

so, this is FALSE

option-D:

`(c)/(3) =3`

Multiply both sides by 3

`3*(c)/(3) =3*3`

`c =9`

so, this is TRUE