SOLUTION: 3 times a certain number plus 7 = 30

Question 286127: 3 times a certain number plus 7 = 30
Answer by PRMath(133) (Show Source): You can put this solution on YOUR website!
3 times a certain number plus 7 = 30

Just break it down to what they give you:

3 times: This is like saying:
a certain number: This is a number we don't know so we'll call it "x"
plus 7: This is
= 30

Put it all together: 3x + 7 = 30

Now solve for x like this:

(subtract 7 from both sides to isolate the "X")
()
(divide both sides by 3 to isolate the "x" further)

Plug in our "x" info and see if the statement is correct:

original equation
Plug into the "x" variable of this equation.

Yayyyy it works. :-)

I hope this helps you. :-)
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