Single Variable Addition
5 + 3 = x
7 - 2 = x
x = 5
X + 7 = 9
x - 3 = 6
Write the problem in words
5 + x = 12
"Five plus x equals twelve"
12 + 5 = x
X = 17
10 - 9 = x
X + 8 = 14
x - 6 = 12
x = 18
What is a Variable?
any letter that is placed within an algebraic equation... an unknown value
3 + 19 = x
16 - 7 =
x = 9
x + 10 = 25
X = 15
x - 10 = 27
x = 37
What is the variable in the follow problem?
5 + x = 12
'x'
21 + 35 = x
23 - 13 = x
x = 10
23 + x = 40
X = 17
x - 17 = 23
x = 40
What is the Inverse Operation (or opposite) for addition (+)?
34 - 6 = x
x = 28
x - 14 = 21
x = 35
What is the Inverse Operation (opposite) for multiplication (x)?
Division (รท)
22 + x = 32
x = 10
12 - x = 4
x = 8
3x + 7 = 22
x = 5
y = 7
Bonus!
12 + x - 5 = 20
x =
x = 13