Simple Equations In Maths
Posted by
Ravi Kumar at Friday, June 19, 2009
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We will have equations of one or two unknowns invariably in every problem. Some times we get three equations in three unknowns. In general, we need as many equations as the variables we will have to solve for. So, for solving for the values of two unknowns, we need two equations (or two conditions given in the problem) and for solving for the values of three unknowns, we need three equations.
One equation in one unknown:
An equation like 2x + 6 = 36 is an equation in one variable. We have only one variable x whose value we have to find out.
Two equations in two unknowns:
A set of equations like
2x + 3y = 10 ………… (1)
3x + 5y = 12 ………… (2)
Is called simultaneous equations in two unknowns. Here, we have two variables ( or unknowns) x and y whose values we have to find out.
And also we use three equations in three unknowns.