One-Step equations (+)
a + 3 = 8
a=5
a + 3 = 8
- 3 -3
a = 5
a - 5 = 4
a=9
a - 5 = 4
+5 +5
a = 9
Samuel went to the store with $25 and ended up leaving with $12. How much was spent?
$13.00
2x + 4x - 5
6x - 5
Give me an example of a variable.
any letter
s, x, n, w, y, z, ...
x + 8 = 12
x=4
x + 8 = 12
- 8 -8
x = 4
a - 10 = 13
a=23
a - 10 = 13
+10 +10
a = 23
Gabriel's goal by the end of the week is to run 32 miles. Gabriel has already ran 18 miles. How many miles does he have left?
14 miles
-6y + 5m - 3y - 2m
-9y + 3m
Define inverse operation
The opposite of an operation
Add <---> Subtract
Multiply <---> Divide
a + 9.4= 16.6
a=7.2
a + 9.4 =16.6
- 9.4 -9.4
a = 7.2
a - 11.5 = 30
a=41.5
a - 11.5 = 30
+11.5 +11.5
a = 41.5
The temperature is 55°. By the end of the day, the temperature is 68°. How much did the temperature change by?
13°
3(2w - 4)
6w - 12
What does a negative number TIMES a negative number get you?
A positive number
x + 1/2 = 1
x = 1/2
9/5=r-8/5
a = 17/5 or 3 2/5
9/5 = r - 8/5
+8/5 +8/5
17/5 = r
Vicki hiked up a mountain and ended at an 11,500 ft. elevation. On her way down, she stopped for a break at 10,217 ft. What is the change in her elevation?
1,283 feet
-6(-7k + 2)
42k - 12
Name the 4 operations.
Addition, Subtraction, Multiplication, and Division
a + 86 = 98
a=-12
a + 86 = 98
- 86 -86
a = 12
a - 19.2 = 55.6
a=74.8
a - 19.2 = 55.6
+19.2 +19.2
a = 74.8
Mr. Walter spent total of $99.78 on new car tags. There was a charge $11.54 spent on the tax. How much were only the car tags?
$88.24
9u + 2(-5u + 10)
-u + 20
What does a negative number PLUS a negative number get you?
A negative number