Question

27х + 277у = 85.8
(0,5х + 0,5у)*102 = 91,5


как это решать , как выразить икс или игрик ? 

Answer 1

$1) : 27x = - 277y + 85.8 \ frac{27x}{27} = - frac{227y}{27} + frac{85.8}{27} \ x = - frac{227}{27} + frac{85.8}{27} \ x = - frac{227y}{27} + 3.17$
$2) : 277y = - 27x + 85.8 \ frac{277y}{277} = - frac{27x}{277} + frac{85.8}{277} \ y = - frac{27x}{277} + frac{85.8}{277} \ y = - frac{27x}{277} + 0.3$
$3) : 0.5x times 102 + 0.5x times 102 = 91.5 \ 51x + 51y = 91.5 \ 51x = - 51y + 91.5 \ frac{51x}{51} = - frac{51y}{51} + frac{91.5}{51} \ x = - frac{51y}{51} + frac{91.5}{51} \ x = - y + frac{91.5}{51} \ x = - y + 1.8$
$4) : 0.5x times 102 + 0.5y times 102 = 91.5 \ 51x + 51y = 91.5 \ 51y = - 51x + 91.5 \ frac{51y}{51} = - frac{51x}{51} + frac{91.5}{51} \ y = - frac{51x}{51} + frac{91.5}{51} \ y = - x + 1.8$