Bellwork
Solve the Systems of
Equations by Graphing
y = -3x - 3
y = 2x + 2
y = -x - 4
4x - y = -1
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Unit 16 Systems of Equations
SPI 3.9 Solve systems of linear
equations/inequalities in two variables
Agenda
Solve systems using substitution
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1
y = 3x
x + y = -32
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4x + 5y = 11
y = 3x - 13
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2
60 - y = x
5x + 3y = 220
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-2x + 5y = 19
3x - 4 = y
y = 2x + 7
y = x - 1
TRY
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3
3y + 4x = 14
-2x + y = -3
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3x - 5y = 11
x - 3y = 1
TRY
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4
x = -2y + 4
x + 2y = 4
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y = 3x - 11
y - 3x = -13
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5
y + 5x = 8
3y = 24 - 15x
TRY
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Practice and Apply
P371 #11-17, 21, 26, 28
SPI 3.9
Systems by Substitution
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6