One Step Equations
solve 12x=132
answer: 11
2x + 3 = 6
answer: 1.5
You need $50 to buy a new pair of sneakers. You get paid $5 an hour to walk your dog and already have $10 saved. How many hours do you need to walk your dog?
8 hours
What is a variable?
A letter or symbol that represents an unknown value.
solve 2b= 18
9
(x/4) + 8 = 24
64
You bought a coffee for $5 and 12 donuts. You spent spent 29 all together. How much did each donut cost?
$2 per donut
How do you define a coefficient?
A number that multiplies or divides a variable; a coefficient always has a variable.
5g = 50
10
solve 2x -3 = 9
6
Kiana had $28 to spend on 7 erasers. How much did each eraser cost?
$4
What is a constant?
A fixes value; a number that stands on its own.
solve x/5 = 30
150
x/7 + 14 = 30
112
Matthew took a cab home from his office. The cab charged a flat fee of $4, plus $2 per mile. Matthew paid $34 for the trip. Write and solve an equation to show the number of miles Matthew drove.
15 miles
What is the goal of solving equations?
To get the variable alone!
solve: 50x = 3000
x = 60
5x + 4 - 3= 106
21
The perimeter of a rectangle is 54 cm. Its length is 6 cm. What is its width?
21
answers may vary