Question

aflați x va rog urgent dau coroana​

Answer 1

Răspuns:

a) 2×(x+1)=14 /:2

x+1=7

x=7-1

x=6

b) (x-3) ×5=75

5x-15=75

5x=75+15

5x=90 /:5

x=18

c) (x+2):24=5

x+2 supra 24 =5 /×24

x+2=120

x=120-2

x=118

d) 6×x+15=20+13

6x+15=33 /-15

6x=18 /:6

x=3

e) 48-2×x=32

-2x=32-48

-2x=-16 /: 2

x= 8

f) 100:(x+3)=20

100 supra x+3=20

100=20(x+3) /:20

5=x+3

5-x=3

-x=3-5

-x=-2

x=2

g) 3×x-7×9=87

3x-63=87 /+63

3x= 150 /:3

x=50

h) 120: (x-7)=5

120 supra x-7= 5

120= 5(x-7) /:5

24=x-7

24-x=7

-x=7-24

-x=-31

x=31