Question

Поможите делать 93 2,4 и 94 2

Answer 1

93.2 $2-\frac{3x-7}{4} +\frac{x+17}{5} =0$

$\frac{40-15x+35+4x+68}{20} =0$

143-11x=0

11x=143

x=13

93.4

$\frac{4x+7}{5} +\frac{3x-2}{2} -\frac{5x-2}{2} =32$

$\frac{8x+14}{10} +\frac{15x-10}{10} -\frac{25x-10}{10} =32$

$\frac{8x+14+15x-10-25x+10}{10} =32$

$\frac{-2x+14}{10} =32$

$-2x+14=320$

$-2x=306$

$x=-153$

94.2

$\frac{3x-7}{4} -\frac{9x+11}{8} =\frac{3-x}{2}$

$\frac{6x-14}{8} -\frac{9x+11}{8} -\frac{12-x}{8}=0$

$\frac{6x-14-9x-11-12+x}{8} =0$

$\frac{-2x-37}{8} =0$

$-2x-37=0$

$-2x=37$

$x=-18.5$