1у= – 2(х + 8) + х - 10 = -2x - 16 + x - 10 = -x - 2x = -28
2у= 3(х - 5) - 20 = 3x - 15 - 20 = 3x - 3x = 12
3у= 5х - 3(х - 15) – 10 = 5x - 3x + 45 - 10 = 2x + 2x = -14
4у= – 7(х – 9) - х - 40 + 0 = -7x + 63 - x - 30 = -8x + 3x = 31/8
1
у= – 2(х + 8) + х - 1
0 = -2x - 16 + x - 1
0 = -x - 2
x = -28
2
у= 3(х - 5) - 2
0 = 3x - 15 - 2
0 = 3x - 3
x = 12
3
у= 5х - 3(х - 15) – 1
0 = 5x - 3x + 45 - 1
0 = 2x + 2
x = -14
4
у= – 7(х – 9) - х - 40 +
0 = -7x + 63 - x - 3
0 = -8x + 3
x = 31/8