Question

Уравнения
1) (12-х) *6,5=23,4
2) (y-3,3):5,3=0,07
3) 153+0,625у=215,5
4)0,32х+0,47=12,8
Помогите пожалуйста

Answer 1

$(12 - x) times 6.5 = 23.4 \ 78 - 6.5x = 23.4 \ - 6.5x= 23.4 - 78 \ - 6.5x = 54.6 \ x = 54.6 div ( - 6.5) \ x = 8.4$
$(y - 3.3) div 5.3 = 0.07 \y - 3.3 = 0.07 times 5.3 \ y - 3.3 = 0.371 \ y = 0.371 + 3.3 \ y = 3.671$

$153 + 0.625y = 215.5 \ 0.625y = 215.5 - 153 \ 0.625y = 62.5 \ y = 62.5 div 0.625 \ y = 100$
$0.32x + 0.47 = 12.8 \ 0.32x = 12.8 - 0.47 \ 0.32x = 12.33 \ x = 12.33 div 0.32 \ x = 38,53125$