SOLUTION: what is the equation for twice the sum of a number and 5 increased by seven is twenty one

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Question 229899: what is the equation for twice the sum of a number and 5 increased by seven is twenty one
Answer by rfer(16322) About Me  (Show Source):
You can put this solution on YOUR website!
2(x+5)+7=21
2x+10+7=21
2x=4
x=2