  PRE-ALGEBRA
ALGEBRA 1
GEOMETRY
ALGEBRA 2
TRIGONOMETRY
PRE-CALCULUS
CALCULUS    Algebra 2, 2008 PAGE: 135 SET: Exercises PROBLEM: 43
Please look in your text book for this problem Statement  Solve the system of equation using Substitution Method:

The equations are Equation (1) Equation (2)

Solve the equation (1) for y. Apply subtraction property of equality: if a = b, then . (Subtract 4x from each side)

Apply commutative property of addition: .  (Apply Additive inverse property: ) (Multiply each side by negative one) (Product of two same signs is positive) Substitute in Equation (2). Distribute terms using distributive property: .  (Simplify) (Add: ) Apply subtraction property of equality: if a = b, then . (Subtract 40 from each side) (Apply Additive inverse property: ) (Subtract: )

Apply division property of equality: if a = b, then . (Divide each side by 9) (Cancel common terms) (Divide: ) Substitute in equation . Apply addition property of equality: if a = b, then . (Add 1 to each side) (Add: 13 + 3 = 16) (Apply additive inverse property: ) Apply division property of equality: if a = b, then . (Divide each side by 2) (Cancel common terms) (Divide: ) The solution is . TESTIMONIALS
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