SOLUTION: The legs of an isosceles triangle have lengths x + 1 and -X + 7. The base has length of 3x - 3. What is the length of the base? a. 6 b. 4 c. 5 d. cannot be determined

Algebra ->  Triangles -> SOLUTION: The legs of an isosceles triangle have lengths x + 1 and -X + 7. The base has length of 3x - 3. What is the length of the base? a. 6 b. 4 c. 5 d. cannot be determined      Log On


   

Question 892883: The legs of an isosceles triangle have lengths x + 1 and -X + 7. The base has length of 3x - 3. What is the length of the base?
a. 6
b. 4
c. 5
d. cannot be determined
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
The two legs which are not the base are equal.
x%2B1=-x%2B7
2x=6
highlight_green%28x=3%29

Knowing x, you can evaluate all three expressions.
Base is given as 3x-3
3%2A3-3
highlight%286%29