In the quadratic equation 2x-y = 4, when x = 5, what is y equal to

How many square tables can be allocated? Problem supplement: the binary linear equation is like this: 2x-y = 5, X: y = 4:3, so x = 4, y = 3 the second way: the solution has x cubic meters as the desktop, 50x = 300 (15-x) △ 4, 50x

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