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Numbers in General Form

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Question

Write algebraic expressions for the following:
When I multiply four - fifth of number x to two - fifth of the sum of numbers x³ and y, I obtain 4 times c subtracted from the sum of y and x

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Solution

Algebraic expression for the given statement is given as
$\frac{4}{5} x \times \frac{2}{5} (x^{3} + y) = (y + x) - 4 c$
$\frac{8}{25} x^{4} + \frac{8}{25} x y - y - x + 4 c = 0$

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