Решите уравнения (12m-5m) х4=252 (1) (2) (4n+3n) х 11=154 3) 45: (4m-m) = 3 (4) (12x-5x) : 4=14 (5) 132 - (x-5) x9=69 (6) 123 - (8x-11) x2=49 (7) 3 (x+7) + 16=52

(12m - 5m) * 4 = 252 (4n + 3n) * 11 = 154

7m = 252 : 4 7n = 154 : 11

7m = 63 7n = 14

m = 63 : 7 n = 14 : 7

m = 9 n = 2

45 : (4m - m) = 3 (12x - 5x) : 4 = 14

3m = 45 : 3 7x = 14 * 4

3m = 15 7x = 56

m = 15 : 3 x = 56 : 7

m = 5 x = 8

132 - (x - 5) * 9 = 69 123 - (8x - 11) * 2 = 49

(x - 5) * 9 = 132 - 69 (8x - 11) * 2 = 123 - 49

(x - 5) * 9 = 63 (8x - 11) * 2 = 74

x - 5 = 63 : 9 8x - 11 = 74 : 2

x - 5 = 7 8x - 11 = 37

x = 7 + 5 8x = 37 + 11

x = 12 8x = 48

x = 48 : 8

x = 6

3 (х + 7) + 16 = 52

3 (х + 7) = 52 - 16

3 (х + 7) = 36

х + 7 = 36 : 3

х + 7 = 12

х = 12 - 7

х = 5