14 + 5x = 4x + 3x
14 + 5x = 7x
14 = 7x - 5x
14 = 2x
x = 14 / 2
x = 7
Ответ: x = 7
3a + 5 = 8a - 15
5 + 15 = 8a - 3a
20 = 5a
a = 20 / 5
a = 4
Ответ: a = 4
3.6 + 2x = 5x + 1.2
3.6 - 1.2 = 5x - 2x
2.4 = 3x
x = 2.4 / 3
x = 0.8
Ответ: x = 0.8
4(3 - 2x) + 24 = 2(3 + 2x)
12 - 8x + 24 = 6 + 4x
36 - 8x = 6 + 4x
36 - 6 = 4x + 8x
30 = 12x
x = 30 / 12
x = 2.5
Ответ: x = 2.5
0.2(5y - 2) = 0.3(2y - 1) - 0.9
y - 0.4 = 0.6y - 0.3 - 0.9
y - 0.4 = 0.6y - 1.2
y - 0.6y = -1.2 + 0.4
0.4y = -0.8
y = -0.8 / 0.4
y = -2
Ответ: y = -2
4x + 12 = 3x + 8
4x - 3x = 8 - 12
x = -4
Ответ: x = -4
3x - 17 = 8x + 18
3x - 8x = 18 + 17
-5x = 35
x = 35 / -5
x = -7
Ответ: x = -7
0.8y + 1.4 = 0.4y - 2.6
0.8y - 0.4y = -2.6 - 1.4
0.4y = -4
y = -4 / 0.4
y = -10
Ответ: y = -10
4(3 - x) - 11 = 7(2x - 5)
12 - 4x - 11 = 14x - 35
1 - 4x = 14x - 35
1 + 35 = 14x + 4x
36 = 18x
x = 36 / 18
x = 2
Ответ: x = 2
0.9(4y - 2) = 0.5(3y - 4) + 4
3.6y - 1.8 = 1.5y - 2 + 4
3.6y - 1.8 = 1.5y + 2
3.6y - 1.5y = 2 + 1.8
2.1y = 3.8
y = 3.8 / 2.1
y ≈ 1.81
Ответ: y ≈ 1.81