Equations
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Mathematics
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8th Grade
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Kenneth Weiss
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4 Slides • 8 Questions
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Equations
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Terms
Terms are variables and constants separated by a + or - sign.
Example: 2x + 3y - 2 + 5 - 4y
2x, 3y, -2, 5, -4y are all terms that are separated by + - signs
therefore this expression has 5 terms
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2 step equations
2x + 4 = 6
1) First we need all the variables on one side and the constants on the other so we subtract 4 from both sides to get 2x = 2
2) Next we isolate the variable. Since, 2x is 2 times x we divide both sides by 2 to get x = 1
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Multiple Choice
2x is performing what operation on 2 and x?
Addition
Subtraction
Multiplication
Division
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Multiple Choice
2x + 3x + 5 = 20
This is a multistep equation. We need to combine like terms on the left side of the equal sign to get a two step equation. What equation shows the equation equivalent (equal) to the equation above with combined like terms.
10x = 20
5x + 5 = 20
30x
6x + 5 = 20
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Multiple Choice
Sometimes we need to distribute before we can get a two step equation.
3(x+2) = 24
After you distribute the equivalent equation becomes:
5x = 24
3x + 2 = 24
3x + 6 = 24
3 + 2x = 24
Equations
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