Question

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

Answer 1

1)22х-10-17х=55.
5х=65
х=13
2)40х+15-12=83
40х=80
х=2
3) 14х+63+3=114
14х=48
х=3,42857143
4) 12х+ 39-25=74
12х=60
х=5

Answer 2

1)2(11Х-5)-17Х=55

22Х-10-17Х=55

5Х-10=55

5Х=55+10

5Х=65

Х=65÷5

Х=13

2(11×13-5)-17×13=55

55=55

5(8Х+3)-12=83

40Х+15-12=83

40Х+3=83

40Х=83-3

40Х=80

Х=80÷40

Х=2

5(8×2+3)-12=83

83=83

3)7(2Х+9)+3=114

14Х+63+3=114

14Х+66=114

14Х=114-66

14Х=48

Х=48÷14

Х=3.428...-??

4)3(4Х+13)-25=74

12Х+39-25=74

12Х+14=74

12Х=74-14

12Х=60

Х=60÷12

Х=5

3(4×5+13)-25=74

74=74