метра
Пошаговое объяснение:
1)
2(х – 2) – 1 = 5(х – 2) – 7;
2x - 4 - 1 = 5x - 10 - 7
2x - 5 = 5x - 17
5x - 2x = 17 - 5
3x = 12
x = 12 : 3
x = 4
2)
4(2х – 6) = 4х – 4;
8x - 24 = 4x - 4
8x - 4x = -4 + 24
4x = 20
x = 20 : 4
x = 5
3)
–9у + 3 = 3(8у + 45);
-9y + 3 = 24y + 135
24y + 9y = 3 - 135
33y = -132
y = -132 : 33
y = -4
4)
0 + 5х = 44 + х;
5x - x = 44
4x = 44
x = 44 : 4
x = 11
5)
27 – 4у = 3 – 8у;
-4y + 8y = 3 - 27
4y = -24
y = -24 : 4
y = -6
6)
5х + 11 = 7х – 3;
7x - 5x = 11 + 3
2x = 14
x = 14 : 2
x = 7
7)
8у + 11 = 4у – 1.
8y - 4y = -1 - 11
4y = -12
y = -12 : 4
y = -3
