The solution of the equation 3 x -7 y -30 if x - y is-A- 4-4B- 3-3- 2-2D- 1-1

The correct option is B (3,3)Given that, x=y and equation nbsp;is nbsp;3x + 7y = 30. Substituting x = y in the equation 3x+7y=30, we get: 3x + 7x = 30 ⇒ 10 ...

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Standard IX

Mathematics

Applications of Pair of Equations

The solution ...

Question

The solution of the equation $3 x + 7 y = 30$ if $x = y$ is.

(4, 4)

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(3, 3)

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(2, 2)

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(1, 1)

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Solution

The correct option is B $(3, 3)$
Given that,
$x = y$ and equation is $3 x + 7 y = 30$ .

Substituting $x = y$ in the equation $3 x + 7 y = 30,$
we get:
$3 x + 7 x = 30$
$\Rightarrow$ $10 x = 30$
$\Rightarrow$ $x = 3$

Thus, $x = y = 3$
In other words, $(3, 3)$ is a solution of the equation $3 x + 7 y = 30$ .

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The solution of the equation 3x+7y=30 if x=y is.

The correct option is B (3,3)Given that, x=y and equation is 3x+7y=30. Substituting x=y in the equation 3x+7y=30, we get: 3x+7x=30 ⇒ 10x=30 ⇒ x=3 Thus, x=y=3 In other words, (3,3) is a solution of the equation 3x+7y=30.

The solution of the equation $3 x + 7 y = 30$ if $x = y$ is.