Question

Помогите. Помогите прошу

Answer 1

$frac{0,35}{ frac{2}{3}x} = frac{0.45}{x-10} \ frac{0,07}{ frac{2}{3}x} = frac{0.09}{x-10} \ 0,07(x-10)=0.09*frac{2}{3}x} \ 0,07x-0.7=0.03*2x \ 0,07x-0.7=0.06x \ 0.07x-0.06x=0.7 \ 0.01x=0.7 \ x=0.7/0.01=700/1=700$

$frac{6.8}{x+8}= frac{2}{x} \ 6.8x=2(x+8) \ 6.8x=2x+16 \ 6.8x-2x=16 \ 4.8x=16 \ x=16/4.8=160/48=20/6=10/3=3 frac{1}{3}$