Question

2(11х-5)-17х=55 5(8х+3)-12=83 7(2х+9)+3х=114 3(4х+13)-25=74 Как решить эти уравнения?

Answer 1

2(11х-5)-17х=55  

22х-10-17х=55

22х-17х=55+10

5х=65

х=65:5

х=13

5(8х+3)-12=83

5(8х+3)=83+12

5(8х+3)=95

8х+3=95:5

8х+3=19

8х=19-3

8х=16

х=16:8

х=2

7(2х+9)+3х=114

14х+63+3х=114

14х+3х=114-63

17х=51

х=51:17

х=3

3(4х+13)-25=74

3(4х+13)=74+25

3(4х+13)=99

4х+13=99:3

4х+13=33

4х=33-13

4х=20

х=20:4

х=5