решите :2х+3х+7=47;2(х+3)=48

Question

решите :2х+3х+7=47;2(х+3)=48

Answer 1

1)2x+3x+7=47

   5x=40

   x=8

 

2)2(x+3)=48

   2x+6=48

   2x=42

   x=21

  

Answer 2

2х+3х+7=47

5х=47-7

5х=40

х=8

 

2(х+3)=48

2х+6=48

2х=42

х=21