Vocabulary
What is a variable?
A letter that represents a number
The opposite of addition
Subtraction
2x+3= 7
x= 2
What is a constant?
A number on its own, or a regular number
The opposite of subtraction
Addition
2g-4= 6
g = 5
2(a+3) = -12
a= -9
m+4= 13/2
m = 5/2
What is an inverse operation?
The opposite operation
The opposite of multiplication
Division
-3x-8= -20
x= 4
What is the Distributive Property?
a(b+c) = ab +ac
What inverse operation would I use to solve this problem?
x+3= 3
Subtract 3 on both sides
-4x+7 = 15
x = -2
2/5(x-2)= -3
x= -11/2
5/3r+ 4/3 = 8/9
r = -4/15
Keep the first fraction the same
Change division to multiplication
Flip the second fraction
What inverse operation would I use to solve this problem?
x/3= 3
Multiply 3 on both sides
0.3y+5= 1
y = 13 1/3
3/4(x+3)= 9
x=9
5/8x+4= 14
x= 16