x-43=(35-x)-48
x-43=35-x-48
x+x=35-48+43
2x=30
x=30:2
x=15
\(x-43=\left(35-x\right)-48\)
\(\Rightarrow x-43=35-x-48\)
\(\Rightarrow x+x-43-35=-48\)
\(\Rightarrow2x-68=-48\)
\(\Rightarrow2x=30\)
\(\Rightarrow x=15\)
Vậy \(x=15\)
x-43=(35-x)-48
x-43=35-x-48
x+x=35-48+43
2x=30
x=30:2
x=15