Question

0.4x-3/1.5x+9= -7/5 the slove

Answer 1

$0.4x - \frac{3x}{1.5} + 9 = \frac{ - 7}{5} \\ = > 0.4x - \frac{3x}{ \frac{3}{2} } + 9 = \frac{ - 7}{5} \\ = > 0.4x - 2x + 9 = \frac{ - 7}{5} \\ = > - 1.6x + 9 = \frac{ - 7}{5} \\ = > - \frac{ 8}{5} x+ 9 = \frac{ - 7}{5} \\ = > - 8x + 45 = - 7 \\ = > - 8x = - 7 - 45 \\ = > - 8x = - 52 \\ = > 8x = 52 \\ = > x = \frac{52}{8} \\ = > x = \frac{13}{2}$