9.1 - Solving Systems of Linear Equations by Substitution

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