-9×+1=-×+17
-9×=-×+16 (subtract 1 from both sides)
-8×=16 ( add x to both sides)
×=-2 (divide -8 from both sides)
PEMDAS
6 + 4 = 10
5(10) = 5*10 = 50
50 is your answer
I hope this helps :)
Aaaa i don’t think you picture matches the equation!
Equilateral is all angles are equal and isosceles has two equal sides