Answer:
First Question: v/lw = h
Second Question: x - y = z
Step-by-step explanation:
First Question: Since you're solving for h, you need to get it by itself. To do so, you need to get l and w on the other side of the equation. To get them on the other side, you need to do the opposite sign. ( for example the opposite sign of addition of subtraction.) Since you're multiplying lwh, you divide l and w off of h.
V = lwh/lw
v/lw = lwh/lw
v/lw = h
Second Equation: It's the same thing as the last equation, but with addition and subtracting. Because you need to get z by itself, you subtract y off our the right side and onto the left.
x = y + z
x =+ y - y +z
x - y = +y - y + z
x - y = z or z = x - y
