The key to solving simple algebraic equations containing a single unknown (e.g. x + 6 = 10) is to realize that the equation is an equality.As long as you do the same mathematical operation (e.g. add a constant, subtract a constant, multiply by a constant, and divide by a constant) to both sides of the equation, the equality is still an equality. This includes squaring both sides of the equation or taking the square root of both sides of the equation.
- Distributive Law: 3(x + 2) = 3x + (3)(2) = 3x + 6
- Associative Law: 4x – 7x = x(4 – 7) = -3x
QUIZ: Solve for x.
|Question 1||Question 2||Question 3||Question 4|
Answers: (1) +2 (2) +2 (3) -9.25 (4) +1.90
This page adapted from a math review for chemistry students at Texas A&M University