Pre-Calc/Chapter 7: Systems and Matrices/7.1 Solving Systems of Two Equations/Solve System by Substitution Solve the system by substitution.  x - 5y = 2-7x - 6y = 27 Solve the system by substitution.

  x - 5y = 2
-7x - 6y = 27]]> 1.0000000 0.3333333 0 true true abc (-3, -1) Correct No solution Incorrect (-4, 0) Incorrect (3, 0) Incorrect Solve the system by substitution. x - 4y = -312x - 4y = -34 Solve the system by substitution.

 x - 4y = -31
2x - 4y = -34]]> 1.0000000 0.3333333 0 true true abc (-3, 7) Correct No solution Incorrect (-2, -3) Incorrect (-2, 6) Incorrect Solve the system by substitution.x - y2 = 0x - 25 = 0 Solve the system by substitution.

x - y² = 0
x - 25 = 0]]> 1.0000000 0.3333333 0 true true abc (25, ±25) Incorrect (25, ±5) Correct (25, 5) Incorrect (±5, 25) Incorrect Solve the system by substitution.x + y = 17x - y = 1 Solve the system by substitution.

x + y = 17
x - y = 1]]> 1.0000000 0.3333333 0 true true abc (8, 9) Incorrect (-9, 9) Incorrect No solution Incorrect (9, 8) Correct Solve the system by substitution.y - x2 = -3xy = x + 5 Solve the system by substitution.

y - x² = -3x
y = x + 5]]> 1.0000000 0.3333333 0 true true abc (-1, 4) and (5, 9) Incorrect (-1, 2) and (5, 10) Incorrect (-1, 4) Incorrect (-1, 4) and (5, 10) Correct