Solving for an Unknown
Solve for L.
A = LW
L = A/W
Halloween (duh!)
Inverse: The __________ operation.
Opposite.
What is the inverse operation of multiplication?
division
Which one DOES NOT have variables on both sides?
a. 3x - 7 =-22x + 5x
b. 3x - 7 = -22 + 5
c. 3x - 8 = 22x + 5
d. 3x - 8x = 22x - 5x
b. 3x - 7 = -22 + 5
Solve for h.
A = Bh
A/B = h
What U.S. city hosts the world’s largest Halloween parade?
NYC!
Which is a like term of 3y?
a. 4y2
b. 3
c. y
d. None of the above
C. y
Which operation do you do first when solving this equation for x?
3x + 8 = 20
a. addition
b. subtraction
c. multiplication
d. division
b. subtraction
What does it mean to SOLVE for a variable?
a. Get the variable completely by itself (coefficient can be any number)
b. Get the variable by itself but other numbers can be on the same side of the equals sign next to it
c. Get the variable by completely by itself (coefficient must be 1)
d. Get different variables together on the same side
c. Get the variable by completely by itself (coefficient must be 1)
Solve for m.
4m = 3n
m = 3n/4
How many bones are in the human skeleton?
206!
What is the first step?
-2(w+5) = 12
Distribute the -2 to (w+5) OR Divide both sides by -2.
Identify the student's mistake and correct it.
3x + 5 = 30
3x = 35
x = 35/3
They added 5 to 30 instead of subtracting 5
3x = 30
x = 10
What is your first step to solve for n?
4n - 1 = 6n + 8 - 8n + 15
Combine like terms (6n - 8n =-2 n)
Solve for k.
4k - 1 = 3j
k = (3j + 1)/4
What were the first-ever fun-size candy bars?
Snickers OR Milky Way
Solve for m.
2(m + 4) = 22
m = 7
John got 5 = 3 as his final answer when solving for a variable. That means there is/are:
a. No solution
b. Infinite Solutions
c. One Solution
d. None of the above
a. No solution
Identify the student's mistake:
-6(2-r) = -8r + 40
-12 - r = -8r + 40
They did not distribute the -6 to the 2 AND -r.
It should be:
-6(2-r) = -8r + 40
-12 + 6r = -8r + 40
Solve for x.
3(x-2) = 3y
x = y + 2
What candy was originally called Chicken Feed?
Candy corn!
3(y - 1) - 4 = 11
y = 6
Ashley is an Amazon Prime subscriber. She pays $8.00 per month for her subscription. If she has paid Amazon a total of $64, how many months has she been a subscriber?
8 months
Solve for j.
-6(2j-2) = -8j + 40
j = -7