Question

-0.8:(1.2x+2.8)=3:(4x-2) помогите пж

Answer 1

$frac{ - 0.8}{1.2x + 2.8} = frac{3}{4x - 2} \ frac{ - 0.8}{4(0.3 x+ 0.7)} = frac{3}{4x - 2}$
$frac{ - 0.2}{0.3x + 0.7} = frac{3}{4x - 2} \ - 0.2(4x - 2) = 3(0.3x + 0.7)$
$- 0.8x + 0.4 = 0.9x + 2.1 \ 1.7x = - 1.7 \ x = - 1$