Question

5x+7x
При x=4. Y=3
7. 5

Answer 1

20+21=41
(5х4)+(7х3)=41

Answer 2

1) 5х+7х=(5•4)+(7•3)=
20+21=21
2) 5х+7х=(5•7)+(7•5)=35+35=70