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3x +5y =2 2x - y …

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3x +5y =2 2x - y = 3 , solve this by substitution method

Posted by Anushka Choudhary 7 years, 6 months ago

CBSE > Class 10 > Mathematics

3 answers

Vivek Kohli 7 years, 6 months ago

Y =34-39/13 -5/13

1Thank You

Vivek Kohli 7 years, 6 months ago

3x +5y= 2 ~equation 1 2x-y=3. Or 2x-3=y ~equ 2 By putting the value of y in equation 2 we get 3x+5×(2x-3)=2 3x+10x-15=2 13x=2+15 X=17/13 Then putting he value of x in equation 2 we get the value of y 2(17/13)-3=y Y=(34/13)-3 34-39/3 Y=-5/3

1Thank You

Hemant Hemant Kumar 7 years, 6 months ago

Let, 3x+5y=2. is eq1 2x - y =3. is eq2 In eq1, 3x + 5y =2 5y=2-3x y= 2 /5- 3x/5 From eq1 we get, y= 2/5 - 3x/5 Now, We substitute y's value in eq2 2x - (2/5-3x/5)=3 2x -2/5+3x/5=3 10x-2+3x/5=3 13x-2=15 13X =15+2 X. =17/13 Now, we find x=17/13 In eq1 we put x=17/13 3(17/13)+5y=2 51/13+5y=2 5y= 2-51/13 5y=26-51/13 5y=-25/13 Y= -25/13 ×5 Y=-5/13 Hence,we find x=17/13 and y= -5/13.

2Thank You

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CBSE > Class 10 > Mathematics