1 задача:
86*4 = 344 мм
2 задача:
120 + (120:2) = 180 м
67-(34+у)+56=73
67-34-у+56=73
89-у=73
у=89-73
у=16
=========================
82x=8054-672;
82x=7382;
x=7382/82;
1) y / z = 30 / 1 => y = 30z
x / y = 11 / 6 => x = 11 * y / 6
x = 330 * z / 6 = 55 * z
2) 55z + 30z + z = 172
86z = 172
z = 2
x = 55z = 55 * 2 = 110
y = 30z = 30 * 2 = 60
Х=441*36/249=<span>63.759
х= (4208*32)/</span>8416=<span>16
х= 38880/(27*48)=30</span>