book Maths Puzzle Numerical Ability

i need to know if you have a problem like - 5x+x what is does the x mean?

Read Solution (Total 0)

book Other Question

How can I simplify this equation to easily find the solutions for x and y to this equation:

x*y = (x+y)*(x+y-1)/4

Thanks Find 4 consecutive integers such that the product of the first and second integers minus 2 is equal to 3 times the product of the third and fourth integers.