How do I solve 1/5x-2=13/25-7/10x for the unknown variable

Isee the amount was $90.00 then reduced to $75.00 , what is the percent ?

Answer soon(fast) 15 pts-brainliest? for right answer with small explination a restaurant catered a party for 40 people. a child’s dinner (c) cost $11 and an adult’s dinner (a) cost $20. the total cost of the dinner was $728. how many children and adults were at the party? use the table to guess and check.(i couldn't get the graph onto the question)                                8 children and 32 adults9 children and 31 adults10 children and 30 adults12 children and 28 adults

Which is f(5) for the function –2x2 + 2x - 3?