Question

The legs of an isosceles triangle have lengths x+1 and -x+7. The base has length 3x-3. What us the length of the base?

Answer 1

The legs of an isosceles triangle are equal, so
x+1= -x+7
2x=6
x=3
Plug x into the equation for the base:
3x-3=3(3)-3=6

Therefore the base is 6 .