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As a retired teacher of mathematics, this question made me smile!

As I often told my middle school students, "You will, probably, only need 10% of the mathematics we teach, in school, to be successful in life. However, only your life can tell you which 10%."

Having said this, linear equations:

1) Would enable you to determine where two lines intersect. (Useful in construction)

2) Find the break even point in marketing.

3) Determine how long it would take to reach almost any goal that could be expressed as a time dependent equation.

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Q: How would solving linear equations help you in your life?
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