Linear equations are based on ratio and proportion which we have already discussed in the previous chapter.
· A linear equation is an algebraic equation in which each term is either a constant or the product of a constant and (the first power of) a single variable.
· Linear equations can have one or more variables.
The monthly income of A & B are in the ratio 6:5 and their expenses are in the ratio 9:7. Saving of A and B are
respectively. Find the income of A.
Income: A = 6x, B = 5x
Expense A = 9y, B = 7y
Saving A = 300, B = 500
6x-9y = 300
5x-7y = 500
After solving these eq. we will get;
Y = 500
Income of A = 6x= 6×800=