Question

solve by cross multiplication method : 2x + 3y = 7 ; 3x + 4y = 10​

Answer 1

Answer:

x = 2

y = 1

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Answer 2

Answer:

x= 2

x= 2y=1

$2x + 3y = 7 - - - - - (1)\\ 3x + 4y = 10 - - - - - (2)$

multiply first equation with 3 and second equation with two

$6x + 9y = 21 - - - - (3) \\ 6x + 8y = 20 - - - - (4)$

y =1

substitute the value of Y in the first equation

$2x + 3 \times 1 = 7 \\ 2x + 3 = 7 \\ 2x = 7 - 3 = 4 \\ x = \frac{4}{2} = 2$