Question

what is simple linear equations

Answer 1

In general linear equations are found in most calculations in science.In chemistry for example,linear equations are used in balancing chemical equations.In physics newton's laws of motion are mostly linear equations.

Definiton

A linear equation is defined as an equation where the greater power of the unknown is one.

Examplesx+5=125x-3=44x=9

In all the above examples the highest power of x is one

Solving simple linear equations

To solve simple linear equations the following points should be noted;

the sign of any term changes when it is moved from either side of the equal sign to the other e.g from the left-handside{L.H.S}to the right-handside{R.H.S}or vice visa.Any operation you do to the left,you must do to the right,this is because the equation will change otherwise.Example1

Solve the equation x+3=4

solve the equation 33x-22=44

Solution

since x is on the left-handside of the equal sign ,we simply move 3 to the other side of the equal sign giving; x = 4-3 therefore x = 1 is the answer.

Answer 2

I am just explaining this not giving the actual definition.

In simple linear equations most probably you have to find what is x.

Examples are like -

Sheela had x number of apples and Meena had 5 number of apples.  Total number of apples is 10. Find how many apples do Sheela have.

This is just a simple one,  but in exams they never ask this simple. It is just for you to understand.

So the answer will be.

Number of apple Sheela has - x

Number of apples Meena has - 5

Total number of apples they have - 10

Number of apple Sheela has =

x + 5 = 10

X = 10 - 5

X = 5

See the pic to understand better...

Here we change sign

Division sign to multiplication - vice versa

Addition to subtraction - vice versa

   

They also ask questions like find x

1) 2x + 5= 25

2x means 2 multiplied by unknown number.  X is unknown number.

We don't write the into sign

2x is one term so we take

2x = 25 - 5 ( we have to transpose just as in the picture I transposed 5 for the word problem)

2x= 20

Now as I told multiplication sign will change to division when we transpose

X = 20 ➗ 2

X = 10

I hope this is helpful and remember I have typed all this not cope paste...