Vocabulary
What is the inverse of Addition?
What is subtraction?
x - 7 = 5
x = 12
7k - 14 = 42
k = 8
Lisa is cooking muffins. The recipe calls for 7 cups of sugar. She has already put in 2 cups. How many more cups does she need to put in?
Let c equal the number of cups left. Make sure to label your answer with units!
c = 5 cups
identify the coefficients of from the following expression;( -3h - 2h + 6h +9)
what is numbers -3, -2 , and 6
A mathematical sentence that shows that two expressions are equivalent.
What is an equation?
-6y = -30
y = 5
r/4 - 12 = -5
r = 28
At a restaurant, Mike and his three friends decided to divide the bill evenly. If each person paid $13 then what was the total bill?
Let b equal the total amount of the bill. Label your answer with units!
b = $52
-13 + 5
-8
When a variable is being multiplied by a fraction, you multiply both sides by the
What is a reciprocal?
r + 23 = 8
r = -15
-5 + 7k = -19
k = -2
331 students went on a field trip. Six buses were filled and 7 students traveled in cars. How many students were on each bus?
Let s equal the number of students on each bus.
s = 54 students
Travell sold half of his comic books and then bought sixteen more. He now has 37. With how many did he begin?
What is 13 books
You need to do what to get the variable on one side of the equation by itself.
What is a inverse operation?
w/8 = 2
w = 16
-12 = 24 + 4b
b = -9
You bought a magazine for $5 and four erasers. You spent a total of $25. How much did each eraser cost?
Let e equal the cost of each eraser.
e = $5
-54 รท -6
9
The goal of solving an equation is to
What is the value of a variabl?
y - 3.5 = -2.1
y = 1.4
9 = 4a +13
a = -1
Jill sold half of her comic books and then bought sixteen more. She now has 36. With how many did she begin?
Let c be the number of comic books Jill started with.
c = 40 comic books
5(8f + 4)
what is 40f + 20