book Maths Puzzle Numerical Ability

This is called a Literal Equation.
Solve (x+7)(y+4)=5 for x in the form x=ay+b/y+c

Read Solution (Total 0)

book Other Question

How much water should be added to 30 gallons of a solution that is 70% antifreeze in order to get a mixture that is 60% antifreeze? The sum of two numbers is 25. Twelve less than four times one of the numbers is 16 more than twice the other number. Find both numbers.