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March 31, 2015

March 31, 2015

Posted by **math help** on Friday, November 23, 2012 at 9:58pm.

I distributed the equation and got 5=5 as my final answer.

b) DONT UNDERSTAND

is the resulting equation from part (a) always true,sometimes ture, or never true? Explain your reasoning.

- math -
**math help**, Friday, November 23, 2012 at 10:09pmplease help me

- math -
**Reiny**, Friday, November 23, 2012 at 10:58pmIf you solve an equation and your variables drop out like in the one above, two cases are possible

1. the resulting statement is true , in which case your equation was an "identity" , and it is true for all values of the variable

or

2. the resulting statement is false, in which case there is no solution at all to your equation

e.g. If your equation had been

3(x+1)+x+2=2(2x+1)+2

you would end up with

5 = 4, a false statement.

Thus your equation would have no solution.

So for your given equation, the statement is always true.

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