solve cross multiplication 3x+4y=25, 5x-6y=-9 please been fastt​

2 thoughts on “solve cross multiplication 3x+4y=25, 5x-6y=-9 please been fastt​”

1. Step-by-step explanation:

   (3x+4y=25)×5 = 15x+20y=125 —————( 1 )

   (5x-6y=-9)×3 = 15x-18y=-27 —————( 2 )

   by solving equations ( 1 ) & ( 2 )

   we get,

   38y=152

   y=4

   put y value in equation ( 2 )

   15x-18(4)=-27

   15x-72=-27

   15x=45

   x=3

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2. Answer:

   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)−64=−9

   6y=15+9

   64=24

   y=4

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