Question

(-4)+(-5)=(-5)+_
find
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Answer 1

Answer:

★ - 4 -5 = - 5 + (-4)

★ -9=-9

Answer 2

Answer:

$\huge\underline\bold\red{Answer}$

$let \: the \: number \: b \: x$

$( - 4) + ( - 5) = ( - 5) + x$

$- 4 - 5 = - 5 + x$

$- 9 = - 5 + x$

$- x = - 5 + 9$

$- x = 4$

$( - 4) + ( - 5) = ( - 5) + ( - 4)$

$x = - 4$