Five less than 3 times a number is -20. Find the number.

Fifteen more than 3 times Neetu's age is the same as 4 times her age. How old is she ?

A's salary is same as 4 times B's salary. If together they earn ₹ 3,750 a month, find the salary of each.

Separate 178 into two parts so that the first part is 8 less than twice the second part.