Question

(repost) Repede!! DAU COROANA​

Answer 1

Răspuns:

Explicație pas cu pas:

a)

2x=2

x=2:2

x=1

7x=7

x=7:7

x=1

=

14x=126

x= 126:14

x=9

-

4*(x+1)=7*4

4x+4=28

4x= 28-4

4x=24

x=24:4

x=6

-

b)

9*14=14*3ˣ

126= 14*9

3ˣ=9

9=3²

x=2

-

2*( 2x+1)=7*2

4x+2=14

4x= 14-2

4x= 12

x= 12:4

x=3

-

10*3x= 10 *(2x+9)

30x= 20x+90

30x-20x=90

10x=90

x= 90:10

x= 9