Solving systems of linear equations by addition and in 3 variables
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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Another name for the addition method is the ________ method? | Elimination
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Solve for x: x+y =9 , x-y=13 | x = 11
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Solve for y: y+x=12 , y-x=8 | y = 10
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Solve for x: 6x-3y=-6 , -x+3y=-4 | x = -2
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Does y=2 in the following equations? 2x+4y=1 , -2x+6y=19 | Yes, y=2
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Solve for x: 3x+4y=13 , 5x-9y=6 | x = 3
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What are the two methods used for solving a system of 3 equations? | elimination or substitution method
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Solve the system for x: 3x-y+z=-15 , x+2y-z=1 , 2x+3y-2z=0 | x = -4
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What is standard form for solving by the elimination method? | Ax + By + Cz = D
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True or false: it is important to always check each solution in all of the given equations. | True
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Solve for y using the following equations: x-4y-5z=35 , x-3y=0 , -y+z=-55 | y = 40
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