Question

how to find x+y=32
how to find x-y =18​

Answer 1

x+y=32

x=32-y

x-y=18

x=18+y

Answer 2

Concept:

First order equations include linear equations. In the coordinate system, the linear equations are defined for lines. A linear equation in one variable is one in which there is a homogeneous variable of degree 1 (i.e., only one variable). Multiple variables may be present in a linear equation. Linear equations in two variables, for example, are used when a linear equation contains two variables. Examples of linear equations include 2x - 3 = 0, 2y = 8, m + 1 = 0, x/2 = 3, and 3x - y + z = 3.

Given:

x+y=32

x-y=18

Find:

Find the value of x and y

Solution:

x+y=32----------------------(i)

x-y=18-----------------------(ii)

On adding the two equations

       x+y=32

       x-y=18

------------------------

        2x=50

         x=25

Substituting this value in eq i

y=32-25

 =7

Therefore, x=25 and y= 7

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