Question

уравнение  3(х-2)-2(х-1)=17

Answer 1

3x-6-2x+2=17

x=17+6-2

x=21

Answer 2

3(х-2)-2(х-1)=17

3х-6-2х+2=17

х=17+4

х=21

 

проверка

3*(21-2)-2*(21-1)=3*19-2*20=57-40=17