1.23 Найдите корень уравнения: a) 4.1x - 2.9x + 7.5 = 7.98; б) 7.8y - (5.6y + 10.6) = 3.7; в) (8.3 - z) - 4.9 = 5.88; г) (11.2 - p) - 4.5 = 31.5.

a) 4.1x - 2.9x + 7.5 = 7.98
1. 2x + 7.5 = 7.98
2. 2x = 7.98 - 7.5
3. 2x = 0.48
4. x = 0.48 / 1.2
5. x = 0.4

б) 7.8y - (5.6y + 10.6) = 3.7
1. 7.8y - 5.6y - 10.6 = 3.7
2. 2y - 10.6 = 3.7
3. 2y = 3.7 + 10.6
4. 2y = 14.3
5. y = 14.3 / 2.2
6. y = 6.5

в) (8.3 - z) - 4.9 = 5.88
1. 8.3 - z - 4.9 = 5.88
2. 3.4 - z = 5.88
3. -z = 5.88 - 3.4
4. -z = 2.48
5. z = -2.48

г) (11.2 - p) - 4.5 = 31.5.
1. 11.2 - p - 4.5 = 31.5
2. 6.7 - p = 31.5
3. -p = 31.5 - 6.7
4. -p = 24.8
5. p = -24.8