Question

$7+ frac{x}{2} = frac{x+9}{5}$ решите уравнение пож:)

Answer 1

$7+frac{x}2=frac{x+9}5 |*10\ 10*7+frac{10*x}2=frac{10*(x+9)}5\ 70+5x=2(x+9)\ 70+5x=2x+18\ 5x-2x=18-70\ 3x=-52\ x=-frac{52}{3}=-17frac23$

Answer 2

$7+frac{x}{2} = frac{x+9}{5}, \ 10cdot(7+frac{x}{2}) = 10cdot frac{x+9}{5}, \ 10cdot7+10cdotfrac{x}{2} = 10cdot frac{x+9}{5}, \ 70+5cdot x=2cdot(x+9), \ 70+5x=2cdot x+2cdot9, \ 70+5x=2x+18, \ 5x-2x=18-70, \ 3x=-52, \ x=- frac{52}{3} , \ x=-17 frac{1}{3} .$