  PRE-ALGEBRA
ALGEBRA 1
GEOMETRY
ALGEBRA 2
TRIGONOMETRY
PRE-CALCULUS
CALCULUS    California Algebra 1, 2008 PAGE: 275 SET: Exercises PROBLEM: 1
Please look in your text book for this problem Statement  The equations are Equation (1) Equation (2)

Multiply the first equation by 4.  (Distributive property: ) (Multiply: ) (Multiply: ) Equation (3) Since the coefficients of the y-terms are additive inverses, y-terms can be

eliminated by adding the equations 2 and 3.

Write the equations in column form and add the corresponding columns.  Apply division property of equality: if a = b then  (Divide each side by  negative 3) (Cancel commen terms) (Divide: ) Now Substitute in either equation to find the value of y. (Equation 1) (Multiply: ) (Subtract 4 from each side) (Apply commutative proparty: a+b=b+a) (Apply additive inverse proparty: ) (Apply additive identity proparty: ) (Subtract: )  (Multiply each side by negative one) (Product of two same signs is positive) (Product of two different signs is negative)

The solution is , . The solution is . TESTIMONIALS
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