Answer:
3x−4y+−3x=6+−3x
−4y=−3x+6
Step 2: Divide both sides by -4.
−4y
−4
=
−3x+6
−4
y=
3
4
x+
−3
2
Step-by-step explanation:
Say that you're thinking of number 
You multiply it by 8, and have 
You add -1 (i.e., you subtract 1) and have 
This equals -17, so you have

Add 1 to both sides

Divide both sides by 8:

So, you were thinking of -2.
Answer:
They are not equivalent equations
Step-by-step explanation:
d=m/v
Multiply each side by v
d * v = m/v *v
dv = m
Divide each side by d
dv/d = m/d
v = m/d
This is not the same as v = m-d
They are not equivalent equations
21:15 because 8:40 + 22 minutes = 9:02