Math, asked by safa21, 10 months ago

x+y=5and2x_3y=4
x + y = 5and2x - 3y = 4

Answers

Answered by sargamkashyap
2
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Answered by Shubhendu8898
2

Answer: x = 19/5 ; y = 6/5

Step-by-step explanation:

Given

x + y = 5 ...............i)

2x - 3y  = 4  ..........ii)

Solving  this  equation by,

Elimination method:- Multiplying eq i) by 3

3x + 3y = 15 ..........iii)

Adding eq. iii) and ii)

(3x + 3y) + (2x - 3y) = 15 + 4

5x = 19

x = 19/5

Putting x = 19/5 in euqation i)

19/5 + y = 5

y = 5 - 19/5

y = (25-19)/5

y = 6/5

Substitution method:- Finding  the  value of x from eq. i)

x = 5 - y   ........iii)

Putting  this  value  of  x  in eq ii)

2(5 -y) - 3y = 4

10  -2y -3y = 4

-5y = 4 - 10

-5y = -6

y = 6/5

Putting  y = 5 in eq iii)

x = 5 - 6/5

x = (25-6)/5

x = 19/5

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