a) 484 + x = -363 - (-548)
=> 484 + x = 185
=> x = 185 - 484
=> x = -299
b) |x + 9| - 13 = 12
=> |x + 9| = 12 + 13
=> |x + 9| = 25
=> \(\orbr{\begin{cases}x+9=25\\x+9=-25\end{cases}}\)
=> \(\orbr{\begin{cases}x=16\\x=-34\end{cases}}\)
Vậy ...
a 484+x=-363-(-548)
x=-299
b /x+9/-13=12
x=-34
a,484+x=-363-(-548)
484+x=185
x=185-484
x=-299
b,|x+9|-13=12
|x+9|=12+13
|x+9|=25
TH1
x+9=25
=>x=16
TH2
x+9=-25
=>x=-34
a) 484 + x = -363 - (-548)
484 + x = 185
x = 185 - 484
x = - 299
b) | x + 9 | - 13 = 12
| x + 9 | = 12 + 13
| x + 9 | = 25
=> x + 9 = 25 hoặc x + 9 = -25
TH1: x + 9 = 25
x = 25 - 9
x = 16
TH2: x + 9 = -25
x = - 25 - 9
x = -34
vậy x =...hoặc x =....