Please help me I’m in the 3rd grade

I believe the answer is percent.

Step-by-step explanation:

You'd be solving for the whole.

Step-by-step explanation:

Since you're going from 75, which would be part, to 100, which is all of something, or the whole.

I can't say I'm fully confident in this answer but I hope it's right. Good luck!

x+14

step-by-step explanation:

x = -3

y = -18

step-by-step explanation:

to solve by substitution, substitute one variable and solve for the other. then substitute again to find the remaining variable.

x-1/3(3x-9) = -3 since y=3x-9 substittute y.

x-1/3(3x-9)=-3

x + x +3 = -3

2x+3=-3

2x+3-3= -3-3

2x=-6

x=-3

substitute again into y=3x-9

y=3(-3)-9

y=-9-9

y=-18