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Using Linear Equations in solving real-world problems. These problems include Age Problems, Mixture Problems, Geometry Problems, Velocity and Acceleration Problems, etc.
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Linear equations is basically of taking out the hidden value of a particular variable for ex.
so, separate the x and normal digits so it will become 3x=30-5
so,now you can subtract so it will be 3x=25
you have to remember always that the sign must change while going to the opposite side as( -) will become (+) and( ÷) will become(×) or vice versa. so now if we have to seperate 3x so it will be x=5÷3 

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