Question

Решите уравнения а)2.136: (1.9-x)=7.12; б)4.2*(0.8+y)=8.82; в)0.2t+1.7t-0.54=0.22; г)5.6z-2z-0.7z+2.65=7.

Answer 1

А)
$2.136:(1.9-x)=7.12$
$1.9-x=2.136:7.12$
$1.9-x=0.3$
$x=1.9-0.3$
$x=1.6$

ответ: 1.6
б)
$4.2*(0.8+y)=8.82$
$0.8+y=8.82:4.2$
$0.8+y=2.1$
$y=2.1-0.8$
$y=1.3$

ответ: 1.3
в)
$0.2t+1.7t-0.54=0.22$
$1.9t=0.22+0.54$
$1.9t=0.76$
$t=0.76:1.9$
$t=0.4$

ответ: 0.4
г)
$5.6z-2z-0.7z+2.65=7$
$2.9z=7-2.65$
$2.9z=4.35$
$z=4.35:2.9$
$z=1.5$

ответ: 1.5