Question

tìm x, biết : 2I 5x - 3I - 2x = 14

Answer 1

\(\Rightarrow x=-\frac{2}{3};\frac{5}{2}\)

Answer 2

2.|5x - 3| - 2x = 14

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

Vì \(\left|5x-3\right|\ge0\)

\(\Rightarrow2.\left|5x-3\right|\ge0\)

\(\Rightarrow14+2x\ge0\)

mà 14 > 0

\(\Rightarrow2x\ge0\)

\(\Rightarrow x\ge0\)

Nên :

2.(5x - 3) = 14 + 2x

10x - 6  = 14 + 2x

10x - 2x = 14 + 6

8x = 20

x = 5/2 = 1,5 

Answer 3

bn làm rõ mk xem nào