Simplifying Expressions
2 (2x + 3) - 5
4x + 1
3 + x = 10
x = 7
no equal sign
You go to the store and buy large bags of skittles for $3 each. You spend a total of $33. Write an equation to find how many bags of skittles you bought.
1. Define the variable.
2. Write an equation
1. Define the variable: number of bags of skittles
2. Write an equation: 3x =33
9z + 10z + z + 3z
23z
6 + 2(-3x+7)
-6x + 20
x/7 = -4
Define variable
You go camping. The campsite costs 25 dollars to reserve and another 10 dollars per night. Your total cost was 55 dollars. Write an equation to show how many nights you stayed?
1. Define the variable.
2. Write an equation
1. number of nights
2. 10x+25 = 55
-10+ 17w + 31
17w + 21
9 (3 + 10x) + 3x
27 + 33x
21 = -4 + x
define equations
a number sentence with an equal sign
You go to the store to buy packs of sunflower seeds. Each pack costs $2. You spend a total of $24. Write an equation to find how many packs of cardinal flower seeds you bought. Do not solve.
1. Define the variable.
2. Write an equation
1. Define the variable: the number of seeds bought
2. 2x = 24
12(t - 4)
What is 12t - 48
5 (3 - 4x) - 8
7 -20x
3x = -30
x = -10
coefficient
a number that is multiplied by a variable
A group of people went out to eat. Each person ordered a shirley temple for $5, and you got a $15 cheesecake for the table. The bill was $30, write an equation to find how many people went out to eat.
1. Define the variable.
2. Write an equation
1. Define the variable: number of people
2. Write an equation: 5x +15 = 30
10(8y - 9z)
What is 80y - 90z
2 - 5x + 3(2x - 3)
-2x -7
10x = 60
x = 6
constant
a number
You were participating in a hockey tournament. You bought a pack of hockey pucks for $4 each, and a hockey stick for $60, your bill was $74. Write an equation to determine how many hockey pucks you bought?
1. Define the variable.
2. Write an equation
1. Define the variable: number of hockey pucks
2. Write an equation: 4x + 60 = 74