How to do an a equivalent ratio word problem?

I'm on khan academy by the way

The sum of two numbers is 23. When the second number is subtracted from the first number, the difference is 15. Find the two numbers. What are the two numbers?

One gym charges a $50 sign up fee and $65 per month. Another gun charges a $90 sign up fee and $45 per month. Foe what number of months is the cost of the gyms equal?

The sum of 14 and a number equal to 17

The sum of four times a number and three is the same as the difference of twice the number and eleven. find the number.

The topping are nuts hot fudge caramel and sprinkles

Barry knows that 6+5=11 what other addition fact does he know?

If x=2 y=9 and z=-5 what is 2 (y+z) (y+z) 3 and (x+y) 2

Which shows a way to take apart 8? 9-9=0 or 9-8=1 or 8-1=7 or 8+8=16 which one

4 batches of punch each batch has 16 fluid oz lemon juice and 4 pints of orange juice if each serving is 1 cup how many servings did it make all together

Apply the law of syllogism to write a new statement based on the following: A → B: If it rains, then football practice will be canceled. B → C: If football practice is canceled, then Patrick will go to the cinema.