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zalisa [80]
3 years ago
11

Five times the sum of 3 and twice some numbers is 70. What is the number?

Mathematics
1 answer:
Anna11 [10]3 years ago
8 0
Let x represent some number
Sum of 3 and twice some number = 3 +2x
Five times the sum of 3 and twice some number: 5(3+2x)

5(3+2x)=70
15+10x=70
Subtract 15 from both sides to have 10x by itself
10x=55
Divide 10 on both sides to get x by itself
x=55/10
x=5.5

Hope this helped
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