Equivalent Equations

• It just is.

• The equations are just equivalent.

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CCSS.HSA.REI.A.1

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CCSS.8.EE.C.7A

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CCSS.8.EE.C.7A

The objective when solving an equation is to....

• isolate the variable.
• check the solution.
• guess and check.
• Combine Like Terms.

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CCSS.7.EE.B.4A

Solve the equation:
-5x = 25

• x = 20
• x = -20
• x = -5
• x = 5

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CCSS.6.EE.B.7

3a + 9 + 4a = 2

• -1
• 1
• no solution
• -7

Tags

CCSS.8.EE.C.7B

4(a + 3) = -32

• -11
• -44
• -20
• -8

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CCSS.7.EE.B.4A

Find the error in the problem below
19 - 2k = 3k - 1
     +3k   +3k
19 + 1k = -1
-19           -19
k = -20

• They should have divided by 1 for the last step
• They should add 19 instead of subtracting 19
• I can not find an error
• Instead of adding 3k they should subtract 3k

Tags

CCSS.HSA.REI.A.1