Answer:
2x + 7= 4x + 17
7=2x+17
-10=2x
-10/2=2x/2
x=−5
4. Scalene
5. Isosceles
6. Isosceles
7. Equilateral
8. Right
9. Scalene
is it a test and what is the lesson name called?
Step-by-step explanation: