All About Equations
One Step Equations
Two Step Equations 1
Two Step Equations 2
Real Life Problems
100
A letter that takes the place of an unknown number is...
A variable
100
Solve.. x + 7 = 11
x = 4
100
Name the two steps in solving two step equations.
1) Add/Subtract 2) Multiply/Divide
100
To move a number from one side of the equation to the other, you must...
Do the opposite operation.
100
Write an equation.. Josh earns 490 dollars per week plus 15 dollars per hour for each hour of overtime. If he brought home 565 dollars, how many hours of over time did he work?
$490 + $15h = $565
200
True or False: An equation can have more than one variable.
True
200
4 + y = -10
y = -14
200
Solve.. 2x + 6 = 24
x = 9
200
Solve... (3/4)x - 4 = 20
x = 32
200
Write an equation.. An electrician charges 30 dollars an hour plus a 20 dollar service charge. If you pay him a total of 180 dollars, how many hours did he work?
$30h + $20 = $180
300
What is the difference between an expression and an equations?
An equation has an equal sign and can be solved. An expression does not have an equal sign and can only be simplified.
300
9 - x = 15
x = -6
300
(p/4) - 9 = 11
p = 80
300
3 - (2/3)y = 15
y = -18
300
Write an equation and solve.. Greg got a go cart 4 years ago for his birthday. He sells is for 1/3 of the the price it originally cost plus a 50 dollar title fee. If Greg gets 1050 dollars, how much did the go cart originally cost?
(1/3)c + 50 = 1050 c = $3000
400
Name the 4 types of equations you are/will learn about.
One Step Two Step Multi Step Variable on both sides
400
-2h = 18
h = -9
400
-7 + 3x = 14
x = 7
400
(4 + x)/5 = 12
x = 56
400
Write an equation and solve.. Tamara is a waitress. She makes an hourly wage of 3.50 dollars plus tips. If she earned 100 dollars tips on Monday and made 121 dollars for Monday, how many hours did she work?
$3.50h + $100 = $121 h = 6
500
A multi step equation has how many steps?
3 or more
500
(1/2)x = 21
x = 42
500
-3 - 4x = -27
x = 6
500
(8 - x)/2 = 17
x = -26
500
Write an equation and solve.. A football team are going to sell autographed jerseys for 25 dollars each. If at the first game they made 1400 dollars but brought in a total of 2200 dollars, how many jerseys will they have to sell?
$1400 + 25j = $2200 j = 32
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