There are many solutions. infinite solutions at that. when you solve it it equals itself 2.5w+21= 2.5w+21 so that means all numbers would work as a solution.
1. is line FG 2. is line IH 3. is angle J 4. is angle H 5. is 12 cm. 6. is 4 cm. 7. is 135 8. is 150 9. sorry can't help you on this one. 10. is 150+90+90=330
