Inverse Basics
What is the inverse operation for x - 14 = 20?
Addition (Add 14)
Solve for x:
x + 9 = 25
x=16
Solve for x:
2x + 1 = 11
x=5
What is the first thing you undo in the equation
4x - 5 = 15?
Add 5?
Solve for y: 2y = 18
y=9
What is the inverse operation for 5x = 40?
Division (Divide by 5)
Solve for y:
y - 6 = 18
y=24
Solve for y:
5y - 7 = 8
y=3
True or False: To solve y/2 + 3 = 7, you divide by 2 first.
False (You subtract 3 first)
Solve for z:
z/3 = 12
z=36
What is the first inverse operation you must use for 3z - 1 = 14?
Addition (Add 1)
Solve for z:
z+3=10
z=7
Solve for z:
z/3 + 5 = 9
z=12
Why must you add 4 to both sides of the equation
w - 4 = 10?
To keep the equation balanced
Solve for a:
7a = 49
a=7
What is the first inverse operation you must use for a/2 + 10 = 15?
Subtraction (Subtract 10)
Solve for a:
a-30=12
a=42
Solve for a:
2a+6=10
a=2
What is the number you would subtract from both sides in 15 = 5x + 10?
10
Solve for b:
b/5 = 4
b=20
State the two inverse operations (in order) needed to solve 4b - 1 = 19.
Addition(1), then Division(4)
Solve for b:
b+ 5 =15
b=10
Solve for b:
-3b + 4 = 16
b=-4
Finish the rule: "Whatever you do to one side of the equation, you must..."
...do to the other side"
Solve for c:
-4c = 24
c=-6