Maria has 8n-30 marbles, her brother has 5n marbles. how many more marbles does maria have than her brother

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At a local museum, the total price for one adult and one child is $11. mrs. smith paid for herself and her three children. she spent $19. record the system of equations to be solved and then find the price of an adult and child ticket using either elimination or substitution.

5. divide and simplify if possible. √250x16√2x 6. what is the solution of the equation? √2x+13−5=x