Question 641332: Five times a certain number plus ten has the same value as two times the same number
minus five. What is the number? Answer by ptaylor(2198) (Show Source):
You can put this solution on YOUR website! Let x=the number
Now we are told that:
5x+10=2x-5 subtract 5x from and add 5 to each side
5x-5x+10+5=2x-5x-5+5 collect like terms
15=-3x divide each side by -3
-5=x or
x=-5 the certain number
CK
5*(-5)+10=2*(-5)-5
-25+10=-10-5
-15=-15
Hope this helps---ptaylor
