Question

Tìm x

a)2I5x-3I-2x=14

b)Ĩx+2I-3x=11

c)Ix+5I+2-x=3x-2

Answer 1

a) 2|5x - 3| - 2x = 14

=> 2|5x - 3| = 14 + 2x

=> |5x - 3| = x + 7

=> \(\orbr{\begin{cases}5x-3=x+7\\5x-3=-x-7\end{cases}}\)

=> \(\orbr{\begin{cases}5x-x=7+3\\5x+x=-7+3\end{cases}}\)

=> \(\orbr{\begin{cases}4x=10\\6x=-4\end{cases}}\)

=> \(\orbr{\begin{cases}x=\frac{5}{2}\\x=-\frac{2}{3}\end{cases}}\)(tm)