Question

решите уравнение: z:8.2=4.1; 18,63:(4,3+m)=2,3; (4,5+x)*3,1=28,52; 6,32y-4,67y+2,55y=25,2

Answer 1

1.
$z \div 8.2 = 4.1 \\ z = 4.1 \times 8.2 \\ z = 3362$
2.
$18.63 \div (4.3 + m) = 2.3 \\ 4.3 + m = 18.63 \div 2.3 \\ 4.3 + m = 8.1 \\ m = 8.1 - 4.3 \\ m = 3.8$
3.
$13.95 + 3.1x = 28.52 \\ 3.1x = 14.57 \\ x = 4.7$
4.
$4.2y = 25.2 \\ y = 6$

Answer 2

1)Z=8.2*4.1=33.62. 2) 18,63:(4,3+m)=2.3;  4.3+m=2.3*18.63;  4.3+m=42.849;  m=42.849-4,3; m=38.549.
3) (4, 5+х)*3,1=28,52;  13,95+3,1х=28,52;  3,1х=28,52-13,95; 3,1х=14,57;  х=14,57:3,1;  х=4,7.
4) 6,32у-4,67у+2,55у=25,2; 4,2у=25,2;  у=25,2:4,2;  у=6.