Question

What must be subtracted from
$3x {}^{2} to \: get - 7x {}^{2}y$


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Answer 1

$assuming \: the \: no. \: is \: y \: \\ \\ 3x {}^{2} - y = - 7x {}^{2} \\ \\ - y = - 7x {}^{2} - 3x {}^{2} \\ \\ - y = - 10x {}^{2} \\ \\ y = 10x {}^{2}$

Answer 2

Answer:

10x is the correct answer

Step-by-step explanation:

$let \: the \: number \: be \: y$

$y - 3x = 7x$

$y = 7x + 3x$

$y = 10x$

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