Question

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3x+4y=25
5x-6y=-9
in substitution method...


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Answer 1

Answer:

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3x+4y=25

5x−6y=−9

Multiply (1) by 3 and (2) by 2

9x+12y=75

(+) 10x−12y =−18

19x=5

x=3

Put x = 3 in (2)

5x−6y=−9

5(3)−6y=−9

6y=15+9

6y=24

y=4

Answer 2

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°°° Explanation °°°

3x+4y=25 ...(1)

5x−6y=−9 ...(2)

Multiply (1) by 3 and (2) by 2

          9x+12y=75

(+) 10x−12y =−18

           19x=57

      x=3

Put  x = 3 in (2)

5x−6y=−9

 5(3)−6y=−9

6y=15+9

6y=24

y=4