SOLUTION: five times the sum of a number and 12 is fifteen.

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Question 157681: five times the sum of a number and 12 is fifteen.

Answer by jojo14344(1513) About Me  (Show Source):
You can put this solution on YOUR website!
Let x be the number.
Let's go in to the condition: Five times the sum of a number = x and 12 -----> highlight%285%28x%2B12%29%29 ---> equals fifteen ----->
5%28x%2B12%29=15 ----------> working eqn
continuing:
5x%2B60=15
5x=15-60 -----> 5x=-45
cross%285%29x%2Fcross%285%29=cross%28-45%299%2Fcross%285%29
x=-9 ---------> Final answer
In doubt? go to the working eqn:
5%28-9%2B12%29=15
5%283%29=15
15=15
Thank you,
Jojo