9.1 - Solving Systems of Linear Equations by Substitution
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Solve by substitution. x - 2y = 4 x - 3y = 6
Answer) x - 2y = 4 --> x = 4 + 2y
Solve by substitution. y = -3x y - x = 24
Answer) y - x = 24
Solve by substitution. y = 8x -y + 2 = -7x
Answer) -y + 2 = -7x
Solve by substitution. 2 + y = 3x 6x - 5y = 8
Answer) 2 + y = 3x --> y = 3x - 2
Solve by substitution. 4x + 5y = 26 3x = y - 9
Answer) 3x = y - 9 --> y = 3x + 9
Solve by substitution. y = 3x - 1 x + y = 11
Answer) x + y = 11
Solve by substitution. y = 3x + 2 x + y = 14
Answer) x + y = 14
Solve by substitution. y = x - 7 x + y = 17
Answer) x + y = 17
