x + 3 = 13
x = 10
x + 5 = 6
x = 1
20= x + 17
3
a + 9 = 21
a=12
What type of math uses letters?
Algebra
x - 5 = 15
x =10
12 = x + 4
x = 8
x - 15 = 20
35
f= 249 + 249
f = 498
What is the name for a letter that stands for an unknown number?
Variable
A + 4 = 10
A = 6
15 = x - 3
x = 18
10 + x = 15
x = 5
g = 999 - 222
g= 777
What is the difference between an equation and an expression?
An equation has an equal sign.
x + 2 =17
x = 15
4 = x + 1
x = 3
x - 5 = 8 + 1 + 1
x = 15
k = 2560 + 25
k=2585
Make up an algebra problem and solve
x + 4 = 10 + 10
x=16
5 + 3 + x = 15
x = 7
2 + 3 + 8 + x = 20
x=7
d = 896 - 896
d = 0
Combine like terms
2x + 3x + 6 + 9
5x + 15
Combine like terms
6x + 6y + 2x + 2y + 4 -️ 3
8x + 8y + 1
Y + (6-1) + 10 = 20
Y = 5
3 - 2 + 9 + D = 25
D = 15
Combine like terms
5 - 4 + 6 + 2j + 9j + 8r - 7r
7 + 11j + 1r
Combine like terms then solve
2c + 8c + 19u - 18u + 2p + 6p
10c + 1u + 8p