а) 5x + 3(x - 1) = 6x + 115x + 3x - 3 = 6x + 118x - 3 = 6x + 118x - 6x = 11 + 32x = 14x = 7
б) 3x - 5(2 - x) + 543x - 10 + 5x + 548x + 44x = 5.5
в) 8(y - 7) - 3(2y + 9) = 158y - 56 - 6y - 27 = 152y - 83 = 152y = 98y = 49
г) 0.6 - 0.5(y - 1) = y + 0.50.6 - 0.5y + 0.5 = y + 0.50.4 = 1.5yy = 0.4 / 1.5y ≈ 0.27
д) 6 + (2 - 4x) + 5 = 3(1 - 3x)6 + 2 - 4x + 5 = 3 - 9x13 - 4x = 3 - 9x5x = 10x = 2
е) 0.5(2y - 1) - (0.5 - 0.2y) + 1 = 0y - 0.5 - 0.5 + 0.2y + 1 = 01.2y = 0.5y = 0.5 / 1.2y ≈ 0.42
ж) 0.15(x - 4) = 9.9 - 0.3(x - 1)0.15x - 0.6 = 9.9 - 0.3x + 0.30.45x = 10.2x = 22.67
з) 3(3x - 1) + 2 = 5(1 - 2x) - 19x - 3 + 2 = 5 - 10x - 19x - 1 = -10x + 419x = 5x = 5 / 19
а) 5x + 3(x - 1) = 6x + 11
5x + 3x - 3 = 6x + 11
8x - 3 = 6x + 11
8x - 6x = 11 + 3
2x = 14
x = 7
б) 3x - 5(2 - x) + 54
3x - 10 + 5x + 54
8x + 44
x = 5.5
в) 8(y - 7) - 3(2y + 9) = 15
8y - 56 - 6y - 27 = 15
2y - 83 = 15
2y = 98
y = 49
г) 0.6 - 0.5(y - 1) = y + 0.5
0.6 - 0.5y + 0.5 = y + 0.5
0.4 = 1.5y
y = 0.4 / 1.5
y ≈ 0.27
д) 6 + (2 - 4x) + 5 = 3(1 - 3x)
6 + 2 - 4x + 5 = 3 - 9x
13 - 4x = 3 - 9x
5x = 10
x = 2
е) 0.5(2y - 1) - (0.5 - 0.2y) + 1 = 0
y - 0.5 - 0.5 + 0.2y + 1 = 0
1.2y = 0.5
y = 0.5 / 1.2
y ≈ 0.42
ж) 0.15(x - 4) = 9.9 - 0.3(x - 1)
0.15x - 0.6 = 9.9 - 0.3x + 0.3
0.45x = 10.2
x = 22.67
з) 3(3x - 1) + 2 = 5(1 - 2x) - 1
9x - 3 + 2 = 5 - 10x - 1
9x - 1 = -10x + 4
19x = 5
x = 5 / 19