3) By elimination method of variable. Solve the simultaneous equations. 5x +2y=9; 4x - y = 15.
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14
Answer:-
(x, y) = (3, -3) is a solution.
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2
Answer:
The value of x is 3 and that of y is -3.
Step-by-step explanation:
Given equations are:
5x + 2y = 9 --(i)
4x - y = 15 --(ii)
We will multiply equation (ii) by 2 so that the coefficients of y becomes same in both the equations.
=> 5x + 2y = 9
=> 8x - 2y = 30
Now we can cancel the term containing y.
This will be done by adding the equations.
=> 5x + 8x = 9 + 30
=> 13x = 39
=> x =3
Now substituting the value of x in equation (ii)
=> 4*3 -y = 15
=> 12 - y = 15
=> -y = 15 - 12
=> -y = 3
=> y = -3
Therefore, the value of x is 3 and that of y is -3.
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