Solve the following pair of linear equations using cross multiplication method:
2x - 5y = 14
x+2y=-2
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Answers
Answered by
17
Answer:
2x - 5y = 14 --------- (1)
x + 2y = -2 ------(2)
(2) x 2 => 2x + 4y= -4 ------(3)
(1) - (3) => -9y = 18
y = -2
x = 2
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Answered by
3
The equation can be written as :
2x-5y-14=0
x+2y= 0
To solve the given pair of equation by cross multiplication ,we have to write their coefficient :
-5 -14 2 -5
2 2 1 2
x = y = 1
____ ____ ____
-10+28 -14 - 4 5+4
x = y = 1
___ ____ _____
18 18 9
X = 18 /9
=2
y = 18/2
= 2
Thus ,the value of X is 2 and Y is 2
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