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# Doubleside

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### Transcript

• 1. Double-Sided Equations
• 2. An equals sign (=) means that the two sides have the same value 2x – 5 6x + 7 =
• 3. Whatever you do to one side, you must do to the other If you only do something to one side, then the equation becomes unbalanced, like the picture above
• 4. You want to get the same types of things together  the variables with the variables, and the constants with the constants Notice how the arrows kind of make a circle 2x – 5 6x + 7 =
• 5. When you take the “6x” across the equals sign , it has to change signs Quick note for remembering: Crossing the sign changes the sign 2x – 5 -6x 6x + 7 =
• 6. Now we can take the – 5 across to the 7. Remember that crossing the equals sign changes the sign – 4x– 5 7 = + 5
• 7. Now, the variable has to be completely by itself. Divide by – 4. – 4x – 4 12 – 4 =
• 8. You are finished! x – 3 =