a) 122 + ( 518 - x ) = -36
144 + ( 518 - x ) = -36
158 - x = -36 - 144
158 - x = -180
x = 158 - (-180)
x = 338
b) 2 ( x - 5 ) = 8
x - 5 = 8 : 2
x - 5 = 4
x = 4 + 5
x = 9
a) \(12^2+\left(518-x\right)=-36\)
\(144+518-x=-36\)
\(662-x=-36\)
\(x=662+36\)
\(x=698\)
vậy \(x=698\)
b) \(2\left(x-5\right)=8\)
\(x-5=4\)
\(x=9\)
vậy \(x=9\)
\(a,12^2+\left(518-x\right)=-36\)
\(\Rightarrow518-x=-36-12^2=-180\)
\(\Rightarrow x=-180-518=-698\)
\(b,2\left(x-5\right)=8\)
\(x-5=8\div2=4\)
\(x=4+5=9\)
\(12^2+518-x=-36\)
\(144+518-x=-36\)
\(662-x=-36\)
\(x=698\)
b) \(2\left(x-5\right)=8\)
\(x-5=4\)
\(x=9\)
