SOLUTION: the some of 20 and a number is 30

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Question 11764: the some of 20 and a number is 30
Answer by elima(1433) About Me  (Show Source):
You can put this solution on YOUR website!
The sum of 20 and a number is 30.
the sum means it is an addition problem, we will let x be "the number",is means =,
so we have:
20+x=30
Work it out:
Subtract 20 from both sides,
20 - 20 + x= 30 -20
x = 10