Simplify Expressions
3x + 4x
7x
3(2x + 4)
6x + 12
x + 5 = 12
x = 7
2x + 3 = 11
x = 4
What is the letter in an expression called?
Variable
5y+2-3y+4
2y+6
5(3y - 1)
15y - 5
3y = 15
y = 5
3y - 5 = 10
y = 5
This type of math problem has no equal sign
Expression
4a + 3b - 2a + 5b
2a + 8b
2(4a + 3b) - 5
8a + 6b - 5
z - 4 = 10
z = 14
4a + 2 = 18
a = 4
What is a the number that is next to the variable called?
Coefficient
(6m - 2 + 4m + 7 - 5m
5m + 5
4(2x + 3) + 2(3x - 5)
20x - 10
2a = 20
a = 10
5b - 10 = 0
b = 2
What is the a number in an expression called when it is by itself
Constant
7x + 2y - 3x + 4 - 5y + 8
4x - 3y + 12
2(x + 3) + 3(2x - 1)
8x + 3
-3x = 9
x = -3
6c + 3 = 21
c = 3
Equation