Unit 6-2: Substitution
no solution
solve by substitution: 2x + y = 5 and 2x + y = 7
infinitely many solutions
solve by substitution: 2x + y = 7 and y = -2x + 7
(6, -3)
solve by substitution: 2x - 3y = 21 and y = 3 - x
infinitely many solutions
solve by substitution: 3x + y = 8 and y = -3x + 8
no solution
solve by substitution: x = -5y + 4 and 3x + 15y = -1
(2, -3)
solve by substitution: x = 2 and 2x + y = 1
(-6, 1)
solve by substitution: x = y - 7 and x = -8y + 2
(-2, -4)
solve by substitution: y = 2x and x + 3y = -14
(1, 2)
solve by substitution: y = 2x and x + y = 3
no solution
solve by substitution: y = 3 and y = 5
no solution
solve by substitution: y = 3x + 5 and y = 3x + 4
(-1, 5)
solve by substitution: y = 3x + 8 and 5x + 2y = 5
infinitely many solutions
solve by substitution: y = 3x - 2 and y = 3x - 2
(3, 9)
solve by substitution: y = 3x and 2x + y = 15
(-2, -9)
solve by substitution: y = 4x - 1 and y = 2x - 5
(1, 4)
solve by substitution: y = 4x and x + y = 5
no solution
solve by substitution: y = 5x - 1 and y = 5x + 2
infinitely many solutions
solve by substitution: y = 5x - 9 and y = 5x - 9
(2, 1)
solve by substitution: y = x - 1 and x + y = 3