Solving Equations
Solve the equation: 3x + 6 = 15
3
Simplify the expression: 3(x + 2)
3x + 6
Simplify:
3x + 2 + 4x + 5
7x + 7
What is a variable?
A letter that represents an unknown number
Solve the equation: 4x - 9 = 15
6
Simplify the expression: 2(3x - 5)
6x - 10
Simplify:
-2x + 4 + 3x - 2
x + 2
What is a coefficient?
The number next to a variable
Solve the equation: 7 - 3x = 28
-7
Simplify the expression: 4(x + 7) - 2x
2x + 28
Simplify:
5x - 2 + 3x + 5 - 4x
4x + 3
Give an example of inverse operations.
multiplication/division or addition/subtraction
Solve the equation: x/5 + 8 = 16
40
Simplify the expression: 14(-5x - 2)
-70x - 28
Simplify:
-6y + 3 - 2y + 7 - 4y
-12y + 10
What is a constant?
A number that doesn't change
-2.5x - 4.2 = 10.8
6
Simplify the expression: 5(2x - 3) + 2(4x + 1)
18x - 13
Simplify:
9x - 3 + 4y - 3x + 7 - 4x - 6y
2x - 2y + 4
What is the difference between an expression and an equation?