Решить уравнение (x-11)×55=660 (x-10)×72=1368

1)(x-11)×55=660

55x-605=660

55x=660-605

55x=1265

x=1265/55

x=23

2)(x-10)×72=1368

72x-720=1368

72x=1368+720

72x=2088

x=2088/72

x=29

У - 6, 5 = 1,2           13-5-х=1,8         2,8 + в + 3,7 = 12,5      (5,6-р) + 3,8 = 4,4
у = 1,2 + 6,5          -х=1,8-13+5         в = 12,5 - 3,7 - 2,8         5,6 - р = 4,4 - 3,8
у = 7,7                    -х=-6,2                 в = 6                              5,6 -р = 0,6
                               х = 6,2                                                       -р = 0,6 - 5,6
                                                                                                 -р = -5
                                                                                                 р = 5
ответ: 7,7             ответ: 6,2           ответ: 6                         ответ: 5

Пошаговое объяснение:

1. 3(х+3)-3(4-х)-х-3  = 3x + 9 - 12 + 3x - x - 3  = 5x - 6

2. 3(х+5)-(4-х)-(1+3)х-3  = 3x + 15 - 4 + x - 4x - 3 = 8

3. 2(х+4)-3(2-х)-х-4  = 2x + 8 - 6 + 3x - x - 4 = 4x - 2

4. х+1-5(2-х)-(5+1)х-5  = x + 1 - 10 + 5x - 6x - 5 = -14

5. х+3-(2-х)-х-4  = x + 3 - 2 + x - x - 4 = x - 3

6. 4(х+3)-(5-х)-х-4  = 4x + 12 - 5 + x - x - 4 = 4x + 3

7. 3(х+3)-4(1-х)-(4+3)х-1  = 3x + 9 - 4 + 4x - 7x - 1 = 4

8. 5(х+5)-3(3-х)-х-3  = 5x + 25 - 9 + 3x - x - 3 = 7x + 13

9. 2(х+2) – 5(2-х)-(5+2)х-1  = 2x + 4 - 10 + 5x - 7x - 1 = -7

10. 2(х+4)-4(5-х)-(4+2)х-3 = 2x + 8 - 20 + 4x - 6x - 3 = -15