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10x+75-5x=110
You can combine like terms, so add the -5x to the 10x. It becomes 5x.
5x+75=110
The next step is to isolate the variable. To do this, you must first move the 75 to the other side of the equation. You can do that by subtracting it from both sides like so:
5x+75=110
-75 -75
5x=35
The variable isn't isolated yet, though. Now you need to get rid of the 5. You can do that by dividing both sides by 5.
5x=35
/5 /5
x = 7.
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