Download F1 Day 2 Solve by Substitution Notes

F1 Day 2 Solve by Substitution Notes
D. i. R. T.
Unit F Day 4
Solve the following system of equations by graphing.
Objective: Solve Systems of Linear Equations by Substitution
y = 5x ­ 2
y = (1/2)x ­ 2
To Solve using Substitution. (ALWAYS WORKS)
y = 2x + 3
x + y = 12
* Solve for one variable.
Solve for x: 3(x ­ 4) = 5x + 2
x + (2x +3) = 12
* Plug the expression into the SECOND equation.
Solve for x in the following equation if y = 2
3x + 3 = 12
* Solve for the remaining variable.
2x + 3y = 4
* Plug that solution in to solve for the remaining variable.
y=2( ) +3
Remember to write your solution as an ordered pair.
Oct 20­8:05 AM
Oct 20­8:14 AM
Solve using substitution.
Solve the following system of equations by substitution.
y = -3x + 5
y = -2x + 1
5x - 4y = -3
2x - 2y = 4
Oct 20­8:31 AM
Oct 20­8:35 AM
For what values of x and y is the following system of equations true.
Solve the following system of equations by substitution.
-3x -3y = -18
y -2x = - 10
2x - 2y = 38
4x - 2y = 5
y = x - 19
y + 6x = 21
Oct 20­8:32 AM
Oct 20­8:36 AM
F1 Day 2 Solve by Substitution Notes
Solve the system of equations using substitution
2x + 6y = 2
-3x - 3y = -15
Oct 22­12:51 PM