Algebra 2
January 27, 2008
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Substitute
Solve for y:
for x in each equation.
Find the additive inverse of each term (what
term can you add to it so that the sum is 0)
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Solve the following system by substitution:
Start by solving for one of the variables in
one of the equations.
◦ Which one do you think would be the easiest to
solve for?
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Solve the following equation using
substitution
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The goal is to eliminate one of the variables
by adding or subtracting the two equations
◦ Which variable could we eliminate in this system?
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Solve this system of equations using
elimination
Which variable would you eliminate this time?
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What if there are no variables will be
eliminated?
MULTIPLY so that the variables will match
What did I do to these equations so the x
variable would be eliminated?
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Solve the following equation by elimination:
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ANY QUESTIONS?????
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Everybody clear on SUBSTITUTION?
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Everybody clear on ELIMINATION?
 Pg
128 #1, 4, 5, 8, 15, 18,
19, 20-22, 24, 25, 28