Question

x+2y = 4
2x+5y = 10

Solve krdo koi please ​

Answer 1

Given :

⠀⠀ ⠀

• x + 2y = 4
• 2x + 5y = 10

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To Find :

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• Value of x and y = ?

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Solution :

⠀⠀ ⠀

The given pair of equations are :

• x + 2y = 4 - (i)
• 2x + 5y = 10 - (ii)

⠀⠀ ⠀

To find value of x and y, let's solve it by using Substitution Method :

⠀ ⠀⠀ ⠀ ⠀⠀ ⠀

From equation (i), we get :

$\sf : \implies x + 2y = 4$

$\sf : \implies x = 4 - 2y$

⠀ ⠀⠀ ⠀

Now, by substituting x = 4 - 2y in equation (ii), we get :

$\sf : \implies 2(4 - 2y) + 5y = 10$

$\sf : \implies 8 - 4y + 5y = 10$

$\sf : \implies 8 + y = 10$

$\sf : \implies y = 10 - 8$

$\sf : \implies y = 2$

$\Large \underline{\boxed{\bf{y = 2}}}$

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Now, by substituting y = 2 in equation (i), we get :

$\sf : \implies x + 2(2) = 4$

$\sf : \implies x + 4 = 4$

$\sf : \implies x = 4 - 4$

$\sf : \implies x = 0$

$\Large \underline{\boxed{\bf{x = 0}}}$

⠀ ⠀⠀ ⠀ ⠀⠀ ⠀

Hence, value of :

• x = 0
• y = 2

Answer 2

Answer:

Solution :

⠀⠀ ⠀

The given pair of equations are :

x + 2y = 4 - (i)

2x + 5y = 10 - (ii)

⠀⠀ ⠀

To find value of x and y, let's solve it by using Substitution Method :

⠀ ⠀⠀ ⠀ ⠀⠀ ⠀

From equation (i), we get :

⟶ x + 2y = 4

⟶ x = 4 - 2y

Now, by substituting x = 4 - 2y in equation (ii), we get :

⟶ 2 ( 4 − 2y ) + 5y = 10

⟶ 8 − 4y + 5y = 10

⟶ 8 + y = 10

⟶ y = 10 − 8

⟶ y = 2

∴ y = 2

Now, by substituting y = 2 in equation (i), we get :

⟶ x + 2 (2) = 4

⟶ x + 4 = 4

⟶ x = 4 - 4

⟶ x = 0

∴ x = 0

Hence, value of :

• x = 0
• y = 2

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