\(a,\left|4-x\right|=10\)
\(\Rightarrow4-x=10\text{ hoặc }4-x=-10\)
\(x=4-10\) \(x=4-\left(-10\right)\)
\(x=-6\) \(x=4+10\)
\(x=14\)
\(\text{Vậy }x=-6;x=14\)
\(b,\frac{4}{5}-x=1\frac{1}{2}\)
\(\frac{4}{5}-x=\frac{3}{2}\)
\(x=\frac{4}{5}-\frac{3}{2}\)
\(x=\frac{8}{10}-\frac{15}{10}\)
\(x=-\frac{7}{10}\)
a, |4-x|=10
TH1: 4-x=10
x=4-10
x=-6
Th2:4-x=-10
x=4-(-10)
x= 14
b,4/5-x=1 1/2
4/5-x=3/2
x= 4/5-3/2
x=-7/10