Question

(iv) [13 + (-12)]=....+[(-12)+(-7)]​

Answer 1

Answer:

[13 + (-12)]=20 +[(-12)+(-7)]

Answer 2

Answer:

$\boxed{20}$

Step-by-step explanation:

$Solve \: for \: \_\_ : \\ =>[13 + (-12)] = \_\_ + [(-12)+(-7)] \\ \\ 13 - 12 = 1: \\ => 1 = \_\_ -12 -7 \\ \\ Substract \: like \: terms. -12 -7 = -19: \\ 1 = \_\_ -19 \\ \\ 1 = \_\_ -19 \: is \: equivalent \: to \: \_\_ -19 = 1: \\ => \_\_ -19 = 1 \\ \\ Add \: 19 \: to \: both \: sides: \\ => \_\_ + (19-19) = 19 + 1 \\ \\ 19 - 19 = 0: \\ \_\_ = 1 + 19 \\ \\ 1 + 19 = 20: \\ => \_\_ = 20$