Question

5x+3y=12 and 7x-4y=25
solve by elimination method ​

Answer 1

Question

5x+3y=12 and 7x-4y=25

solve by elimination method

Answer:

5x +3y =12 ....(i)

7x -4y = 25....(ii)

multiplying (i) by 4 and (ii) by 3 we get

20x + 12y = 48

21x - 12y = 75

Adding the equations we get

41x = 123

=> x = 3

$there fore$ y = 12 -15/3 = -1