Question

200. Решите уравнение: 1) 2(11x 5) - 17x = 55; 2) 5(8x + 3) - 12 = 83; - 3) 7(2x + 9) + 3x = 114; 4) 3(4x + 13) - 25= 74.​

Answer 1

1) 2(11x-5)-17x=55

22x-5-17x=55

22x-17x=55+5

5x=60

x=60:5

x=12

2)5(8x+3)-12=83

40x+15-12=83

40x=83-15+12

40x=80

x=80:40

x=2

3)7(2x+9)+x=114

14x+63+x=114

14x+x=114-63

15x=51

x=3,4

4)3(4x+13)-25=74

12x+39-25=74

12x=74+25-39

12x=60

x=5