Question

dau coroana !!!!repedeee​

Answer 1

Răspuns:

x+2a+2b=20

x+2(a+b)=20

x+2·8=20=>20-16=>x=4

________

x+6=23+7a+7b

x+6=23+7(a+b)

x+6=23+7·8

x=23+56-6=>x=73

________

5a+5b-x=12

5(a+b)-x=12

5·8-x=12

-x=12-40

-x=-28=>x=28