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When a number is decreased by 20 of itself the result is 56?
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When a number is decreased by 20 of itself the result is 56?

User Acejazz
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let the number be x
x-20=56
collect like terms or add 20 to both sides
by collecting like terms
x=56+20
x=76

by adding 20 to both side
x-20+20=56+20
x=76
User Palani Kannan
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