2x - 3y = 9; 2x + y = 13 solving linear equations in two variables with full process of solving
Answers
Answered by
2
Step-by-step explanation:
first 2x-3y=9
(1)X=0, Y=-3
2×0-3×{-3}
-3×-3
9
(2) X=4,Y=1
2×4-3×1
12-3
9
second 2x+y=13
(1)X=5,Y=3
2×5+3
10+3
13
(2) X=7,Y=-1
2×7+(-1)
14-1
13
Answered by
1
Answer:
First of all you have to compare both the equation by subtracting the smaller eq from the larger eq.
Step-by-step explanation:
Here, take 2x-3y = 9 as Eq no (1) and the another one as eq no (2)
Now subtract eq 1 from 2
2x+y-(2x-3y) = 13 - 9
2x + y -2x + 3y = 4 (Here 2x - 2x = 0 I am not writing in the next line)
4y = 4
y = 4/4
y = 1 (Put the value of y in any of the equation and you will get the value of x)
2x - y = 9
2x - 1 = 9
2x = 10
x = 10/2
x =5
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