Determining the cutting point of Two Line

Determining the intersection of two straight lines is identical to solving the solution of a two-variable linear equation system either by eleminisai method, substitution method or graph method. The following is an example of determining the intersection of two lines by the method of elimination and substitution.

Example :
Determine the cutting point of the equation of line y = 3x + 5 and y = -2x + 15!

Answer:
Elimination y:

5x = 10
5x/5 = 10/5
x = 2

Substitution x = 2 into y = 3x + 5
y = 3x + 5
y = 3(2) + 5
y = 6 + 5
y = 11

So the intersection of the line equation y = 3x + 5 and y = -2x + 15 is (2, 11).

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Referensi :

• To'Ali's book math group accounting and sales

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