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How do you know whether to add on both sides or subtract on both sides when solving an equation

How do you know whether to add on both sides or subtract on both sides when solving an equation
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How do you know whether to add on both sides or subtract on both sides when solving an equation

User Niklr
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If it's a positive number you subtract from both sides, but if it's a negative number you add on both sides.
User Landin Martens
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