Question

tìm x bt

Answer 1

a. x + 13 = -44

x = -44 - 13 = -57

b. x + 20 = 20

x = 20 - 20 = 0

c. x + 7 = -8

x = -8 - 7 = -15

Answer 2

 \(x+13=32-76\\ \Leftrightarrow x+13=-44\\ \Leftrightarrow x=-57\)

 .\(x+20=95-75\\ \Leftrightarrow x+20=20\Leftrightarrow x=0\)

\(x+7=\left(-5\right)+\left(-3\right)\Leftrightarrow x+7=-8\Leftrightarrow x=-15\)