Johnny

Johnny bought for 28 CZK flower to mum. He that spent 4/7 of the money saved. How much money he had saved? How much money left him?

Result

x =  49
x =  21

Solution:


28 = 4/7 x
y = x-28

4x = 196
x-y = 28

x = 49
y = 21

Calculated by our linear equations calculator.








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To solve this example are needed these knowledge from mathematics:

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