SOLUTION: what is the length of AB in a triangle equation is x+4+x+x+5=21 then find AB x+4=

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Question 1007374: what is the length of AB in a triangle equation is x+4+x+x+5=21 then find AB x+4=
Found 2 solutions by It is costly, ikleyn:
Answer by It is costly(175) About Me  (Show Source):
You can put this solution on YOUR website!
AB x+4= is not clear could you re write it another way?

Answer by ikleyn(52794) About Me  (Show Source):
You can put this solution on YOUR website!
.
what is the length of AB in a triangle equation is x+4+x+x+5=21 then find AB x+4=
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If the original equation is x+4+x+x+5=21, then it is equivalent to

3x + 9 = 21,

3x = 21 - 9,

3x = 12,

and has the solution x = 12%2F3 = 4.

Then AB = x + 4 = 4 + 4 = 8.