Question

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⭐write the formula øf ➡linear simultaneous equations (with two variables)⭐



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Answer 1

I give you example
addition
x + 5 = 7
x + 5 = 7 - 5 = 2
= x = 2
subtraction
x - 9 = 5
x -9 = 5 -9
= x = -4
multiply
4p = 12
= 12÷4 = 3
= P = 3
division
$\frac{x}{5} = 2 \:$
= 5 ×2 = 10
= x = 10

Answer 2

Linear Equations with Two Variables

You are very much familiar with linear equations in one variable which can be represented in generalized form as “ax = b” where a, b are constants and x is a variable.
For eg: 3x = 5
x = 5/3
Since in the above equation, there is only one variable “x”. The degree of this variable is one as you can see, thus, the equations of this sort are called linear equations is one variable.
In a similar way, when an equation is having two variables with every variable in first degree such that variables are not multiplied with each other then it is called as a linear equation in two variables.
In generalized form it can be written as  ax+by = c  where a, b, c are constants and x, y are variables.
For eg: 5x+3y = 7
Now, it is too obvious that solution of this equation i.e. values of x and y can’t be evaluated with the help of this single equation. That’s why we always call for the linear system with two variables because there must be two equations in same variables to get a solution otherwise the value of the one variable will be in terms of another variable.
So, to solve  linear equations with two variables a number of methods are available which we are going to discuss now.