Rose Sulik
New Member
The Sum of three times a number and 18 is -39. Find the number.
I was always confused with these problems and never understood them. Any help would be much appreciated!!
Thank you!
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- Thread starter Rose Sulik
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I was always confused with these problems and never understood them. Any help would be much appreciated!!
Thank you!
The phrase a number means an arbitrary variable, let's call it x.
Three times a number:
3x
And 18 means we add 18
3x + 18
The word is means equal to, so we set 3x + 18 equal to -39
3x + 18 = -39
This is your algebraic expression. If you want to solve for x, plug it into the search engine and you get x = -19
Three times a number:
3x
And 18 means we add 18
3x + 18
The word is means equal to, so we set 3x + 18 equal to -39
3x + 18 = -39
This is your algebraic expression. If you want to solve for x, plug it into the search engine and you get x = -19