2 years ago

When 4 times a number is increased by 40, the answer is the same as when 100 is decreased by the number. find the number?

1 answer:

8 0

The number is x

4x+40=100-x
add x to both sides
5x+40=100
minus 40 both sides
5x=60
divide both sides by 5
x=12
the number is 12

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