Question

Solve: x + 2y = 5 and 2y + 3x = 3 by substitution method

Answer 1

let X+2y=5 be the first equation and 2y+3x=3 be the second equation
now from first equation X=5-2y and let this be the third equation
now substitute equation 3 in equation 2
therefore,y = 3 now substitute this value in equation 2 , therefore the value of X= -1

Answer 2

THANKS FOR THE QUESTION !

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GIVEN :

=> X + 2Y = 5 ..................1

=> 3X + 2Y = 3 ................2

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TAKE EQN. 1 AND MAKE IT READY TO SUBSTITUTING ......

=> X + 2Y = 5

=> X = 5 - 2Y .....................3

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PUT EQN . 3 IN EQN. 2

=> 3 ( 5 - 2Y ) + 2Y = 3

=> 15 - 6Y + 2Y = 3

=> -4Y = 3 - 15

=> -4Y = -12

=> Y = -12 / -4

=> Y = 3

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PUT Y = 3 IN EQN . 1

=> X + 2Y = 5

=> X + 2*3 = 5

=> X + 6 = 5

=> X = 5-6

=> X = -1

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HOPE IT WILL HELP U.....

THANKS AGAIN.......

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