Answer: An equation should have one LHS and one RHS with an equal sign between them.
If the eqauality sign doesnt exist, then it is not an equation ,but only an expression.An expression could only be simplified and cannot be solved as there is nothing to solve. The present question is only an expression and so cannot be solved.The students should clearly understand the difference between expression and equation.
3px - py + 3qx - qy
= p (3x-y) + q (3x-y)
= (3x-y) (p+q)
Get 5 credit points for each correct answer. The best one gets 25 in all.
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