Question

9. What must be subtracted from 7 to obtain -15?
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Answer 1

Answer:

$\huge\orange {22}$

Step-by-step explanation:

$Let \: the \: unknown \: no: \: be \: x.$

According to the Q,

$>> 7 - x = -15$

$>> 7 + 15 = x$

$>> x = 7 + 15$

$\orange{>> x = 22}$

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Answer 2

Step-by-step explanation:

x-7=-15

x=-15-7

×=-22