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If 7x + 3y = 4 and 2x + y = 2, then find the value of x and y.
1. x = 6, y = -2
2. x = -2, y = 6
3. x = -3, y = 4
4. x = 4, y = -3

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Best answer
Correct Answer - Option 2 : x = -2, y = 6

Given:

7x + 3y = 4 and 2x + y = 2

Calculation:

7x + 3y = 4      ----(1)

2x + y = 2     ----(2)

By solving,

equation (1) - 3 × equation(2)

⇒ 7x + 3y - 3(2x + y) = 4 - (3 × 2)

⇒ x = -2

Putting the value of x in equation (1)

7x + 3y = 4

⇒ 7 × (-2) + 3y = 4

⇒ y = 6

∴ The value of x and y is -2 and 6.

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