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Why can not be 'solved' the way can?

Class 6AlgebraAlgebra
  • ABecause has a coefficient.
  • BBecause has no equals sign, so there is nothing to make true.
  • CBecause cannot be multiplied by 3.
  • DBecause has two terms.

Step-by-Step Solution

You solve an equation — a statement that two sides are equal. is only an expression, so there is no value to hunt for; you can evaluate it for a chosen , but not solve it. Having a coefficient or two terms is irrelevant — has both a constant and two terms as well.
Answer: B) Because has no equals sign, so there is nothing to make true.

Key idea: Evaluating an expression

To evaluate an expression, **substitute** a value for the variable and compute. If , then becomes . The same expression with gives . Practise substituting — it is the bridge between an algebraic expression and a real number.

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