Question

The sum of a number and five is twelve

Answer 1

Answer:

"a number" = 7

Step-by-step explanation:

let "a number" = x.

x + 5 = 12

Isolate the variable x. Note the equal sign, what you do to one side, you do to  the other. Subtract 5 from both sides.

x + 5 (-5) = 12 (-5)

x = 12 - 5

x = 7

7 is your answer.

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Answer 2

Answer is 7
X+5=12
X=12-5
X=7
To check
7+5=12
12=12