(1) Yes (2) Yes (3) Yes (4) No (5) No (6) Yes.

2.(4x-3)÷7 (7y+3)÷4

3.5

4.

X, 0 5-3 3.5

y，-3.5 4 - 1 0.5 -2.75- 19。

5.{0 {5 { 10

{-2 { 1 {4

I can only tell you this. I typed them letter by letter in order to work hard.

——————————————— Take mine! ——————————————————