Question 666738: When 8 is added to certain number and the sum is multiplied by 3,the result is 57.find the number? Found 2 solutions by Evy Hofbauer, lenny460:Answer by Evy Hofbauer(7) (Show Source):
You can put this solution on YOUR website! first put it into an equation
(8+x)3=57
solve for x
(8+x)3=57 Divide by 3 on both sides
8+x=19 Subtract 8 on both sides
x = 11
Show source for better spacing.
You can put this solution on YOUR website! When 8 is added to certain number and the sum is multiplied by 3,the result is 57.find the number?
(8 + n)3 = 57
Divide each side by 3
(8 + n)3 / 3 = 57 / 3
8 + n = 19
Subtract 8 from each side of the equation.
8 + n - 8 = 19 - 8
Combine like terms:
8 - 8 = 0
19 - 8 = 11
n = 11
