1 step equations
x+3=7
x=4
2x+3=7
x=2
Sarah has 3 apples. She buys some more apples and now has 7 apples. How many apples did Sarah buy?
4 apples
sum
definition- the result of adding two or more numbers
5x=20
x=4
3x - 4=11
x=5
John has 5 times as many pencils as Tom. Tom has 4 pencils. How many pencils does John have?
20 pencils
Quotient
Definition- the result of dividing one number by another.
x/4=3
x=12
x/2+5=9
x=8
Emma buys some packs of stickers. Each pack has 6 stickers. She buys 4 packs and now has 30 stickers. How many stickers did Emma have before?
6 stickers
Variable
Definition- a symbol, usually a letter, that represents an unknown number.
-3x=9
x=-3
−4x+7=3
x=1
A rectangle’s length is 3 meters more than twice its width. If the perimeter of the rectangle is 36 meters, what is the width?
5 meters
coefficient
definition- a number that multiplies a variable.
2x/5=6
x=15
3x/5 - 2=7
x=15
A car rental company charges a flat fee of $50 plus $0.20 per mile driven. If the total cost for renting a car was $86, how many miles did the car drive?
180 miles
Distributive property
Definition- multiplying the number outside the parentheses by each number inside the parentheses.