а)х+3х+5=17 б)3,5х+2,2х=4,56

Question

а)х+3х+5=17

б)3,5х+2,2х=4,56

Answer 1

х+3х+5=17

4х+5=17

4х=17-5

4х=12

х=12:4

х=3

 

3,5х+2,2х=4,56

5,7х=4,56

х=4,56:5,7

х=0,8