6/11/20 Systems of Linear Equations Review

Master Systems of Linear Equations! Practice substitution, elimination, and graphing methods. Solve special systems. 8th-grade math review.

What is the solution of the following system? (Use substitution).y = 2x - 7y = 11 (-3,-11) (8,11) (-2,-11) (9,11) Which method is best? Click on the best method to use to solve the system of equations. Substitution Method y = 2x - 1 and 3x + 4y = 12 5x - 2y = 15 and x = -2y - 7 y = -3x + 4 and y = -7x + 9 Elimination Method 3x + y = 14 and 4x - y = 21 x + y = 3 and 2x - y = 0 Special Systems Not every system of equations has one easy solution. There are special situations that can lead to no solution or infinitely many solutions. Fill in the blanks below. Use the word bank to help you. A system of equations has no solution if the lines are parallel.A system of equations has infinite solutions if the last are the same.A line has one solution if the lines intersect once. System of Equations - Graphing Use the graph to find the solution to the following system of equations. Click on the paintbrush to plot points and then under the star, you will find the line tool so you can connect your points.y = -2x - 4 y = 3x + 1 Solution to a System of Equations Write the coordinates to the solution to this system of equations as (x,y) - no spaces! (1,3) What is the correct first step to solve this system of equations?4x - 3y = -102x + 3y = 4 add the two equations together subtract the two equations multiply the second equation by 3 multiply the first equation by 4 Solve the following system of equations:2x + y = 73x - 4y = 5 (-1, 9) (-3, -1) (7, 4) (3, 1) Solve the following system of equations:x = 2y -84x + y = 13 (2, -5) (-2, 3) (2, 5) (-2, -5) When using substitution to solve this system of equations, what is the result of the first step?x = 6y + 3x + 2y = 5 x + 2(6x+3) = 5 x + 2(6y+3) = 5 6y + 3 + 2y = 5 6x + 3 + 2y = 5