0,2t+1,7t-0,54=0,225,6-2z-0,7z+2,65=7

Найдем корни уравнений.

1) 0,2 * t + 1,7 * t - 0,54 = 0,22;

Приведем уравнение к виду a * x = b.

0.2 * t + 1.7 * t = 0.22 + 0.54;

0.2 * t + 1.7 * t = 0.2 + 0.5 + 0.02 + 0.04;

t * (0.2 + 1.7) = 0.7 + 0.06;

t * 1.9 = 0.76;

1.9 * t = 0.76;

t = 0.76/1.9;

t = 0.4.

2) 5,6 - 2 * z - 0,7 * z + 2,65 = 7;

-2 * z - 0.7 * z = 7 - 5.6 - 2.65;

z * (-2 - 0.7) = 2 - 0.6 - 2.65;

z * (-2.7) = 1.4 - 2.65;

-2.7 * z = - 1 - 0.25;

-2.7 * z = - 1.25;

2.7 * z = 1.25;

z = 1.25/2.7;

z = 12.5/27;

x = 125/270;

x = 25/54.