Simplifying Expressions
Simplify the following expression:
3x + 5 + 2x +7
5x + 12
Simplify the following expression:
2(4x + 5)
8x + 10
Solve the following equation:
6x + 9 = 21
x = 2
What is the opposite operation of multiplication?
Division
Simplify the following expression:
7x + 12 - 6x - 5
1x + 7
Simplify the following expression:
3(2x + 9) + 2x - 5
8x + 22
Solve the following equation:
8 + 5x = 43
x = 7
When solving an equation, what you do to the left, you must do to the _____.
right
Simplify the following expression:
- 6x - 7x - 8 - 3
- 13x - 11
Simplify the following expression:
- 4(3x + 1) - 2x - 2
- 14x - 6
Solve the following equation:
9x - 18 = 9
x = 3
When you simplify an expression, you combine ______ terms.
like
Simplify the following expression:
4.5x + 2.6 - 3.8x - 1.2
0.7x + 1.4
Simplify the following expression:
2(4 + 8x) + 4(1x - 1)
20x + 4
Solve the following equation:
- 4x + 7 = 15
x = - 2
When you have terms inside parentheses, you have to ________.
(Hint: I'm not looking for "multiply".)
distribute
Simplify the following expression:
(1/2)x - 2 + (8/2)x - 9 + 1
(9/2)x - 10
Simplify the following expression:
3.2(5x - 1) - 2.6(4x + 1)
5.6x - 5.8
Solve the following equation:
- 6 - 10x = - 56
x = 5
To check your work, you plug your solution for x back into the original equation. What is this process called?
Substitution