Example Problem of Linear Equations One Variable In Everyday Life

Example Problem Equations the linear variable - Hello faithful Basic Mathematical Formulas met again in the material of the sample questions and discussion. We will learn on this occasion is the one variable linear equation in which the matters that will be discussed this time relating to everyday life. Previously we've covered about Linear Equations and Inequalities One Variable that you should read and understand before listening to the discussion of the problems that exist below. However, if you feel already familiar with the concept of equality and linear inequality one variable, let's just look together the explanation of the following:

Example Problem of Linear Equations One variable

Example Problem 1
Mr. Sarif has a piece of land, rectangular, width of the land is 5 meters shorter than its length. Sarif land roving pack is 50 meters. What is the length and width of the land Mr Sarif?

Solved:

Unknown : itinerant ground = 50 m
Suppose that the length of the ground = x, then the width of the ground = x -5
roving rectangular ground = circumference
50 = 2 (p + l)
50 = 2 (x + x - 5)
50 = 2 (2x - 5)
50 = 4x - 10
50 + 10 = 4x
60 = 4x
60: 4 = x
15 = x
Long ground = x = 15 meters
The width of the ground = x - 5 = 15-5 = 10 meters



[1 9459008] Example Problem 2
Given the number of three consecutive even numbers is 66. Find the smallest number!

Solved:

Unknown : Three of even number amounts to 66
numbers even has a +2 pattern, eg number gena p The first is x, then an even number of second- and third-row is x + 2, and x + 4, so that:

Bil.1 + Bil.2 + Num. 3 = 66
x + (x + 2) + (x + 4) = 66
3x + 6 = 66
3x = 60
x = 20
even number of first = x = 20
even numbers of both = x + 2 = 20 + 2 = 22
even number three = x + 4 = 20 + 4 = 24


Example Problem 3
the value of x which satisfy the equation 3x + 5 = 14 is ...

Solved:
3x + 5 = 14
3x = 14-5
3x = 9
x = 9: 3
x = 3


Example Problem 4
for the equation 4x + y = 12, if x = -1 then y is ...

Solved:
4 (-1) + y = 12
-4 + y = 12
y = 12 + 4
y = 16


Sample Problem 5
the value of x which satisfy the equation 5x- 7 = 3x + 5 is ..

Solved:
5x- 7 = 3x + 5
5x - 3x = 5 + 7
2x = 12
x = 6

Thus the discussion of Example Problem equations n Linear Single Variable we can give on the matter this time. Hopefully what has been described above can make you understand more deeply about how to solve the problems of one variable linear equations. Thank you very much for reading this very well. See you in the discussion about selanjunya.

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