SOLUTION: I need to indicate whether the equation is an identity or a contradiction and give solution set 3x+7-x=2x+21

Question 487266: I need to indicate whether the equation is an identity or a contradiction and give solution set 3x+7-x=2x+21
Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!
Start with the given equation.

Combine like terms on the left side.

Subtract from both sides.

Subtract from both sides.

Combine like terms on the left side.

Combine like terms on the right side.

Simplify.

Since this equation is NEVER true for any x value.

So there are no solutions.

Therefore, this equation is a contradiction.
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