Would anyone me with these math questions you very much.

1.which of the following is an example of an open operation?
a. 5x+7=12
b. 12+(-8)=4
c. 25=5(5)
d. 8+0=8
my answer for this one is a.

2. which of the following equations has 3 as a solution?
a. -2b=6
b. 4a-5+12
c. 5y=y+8
d. z-15=-12
3.is (1,5) a solution to the equation y=x-2?
yes
no
4. is (-2, -6) a solution to the equation y=3x
yes
no
5. which of (3,5) , (4,6) (5,7), and (6,8) are solutions to y=x+2
a. (3,5) and (4,6)
b. (4,6) and (5,7)
c. none
d. all
8. what does it mean to inductive reasoning to solve a problem?
a. to solve by guessing
b. to draw a picture
c. to solve by observing patterns
d. to ask someone for .