Question

7 - 5 x is equal to 5 - 7 x​

Answer 1

Answer:

x = (-1)

$\rule{300}{1}$

Step-by-step explanation:

Given that 7 - 5x = 5 - 7x

We will transport the like terms. Remember, while transporting :-

(+) changes to (-)

(-) changes to (+)

(÷) changes to (×)

(×) changes to (÷)

Now, here, we have

7 - 5x = 5 - 7x

Transport 7x from RHS (right hand side) to LHS (left hand side)

⇒7x - 5x = 5 - 7

(since, symbol changes)

⇒ 2x = - 2

$\implies x = \frac{-2}{2}\\\\\implies x = -1$

$\rule{300}{2}$

Answer 2

Answer:

x = -1

Step-by-step explanation:

7 - 5x = 5 - 7x

⇒ - 5x + 7x = 5 - 7

⇒ 2x = - 2

⇒ x = $\frac{-2}{2}$

⇒ x = - 1

So, the value of x is - 1.

Verification ;

Putting the value of x in the above equations.

7 - 5x = 5 - 7x

⇒ 7 - 5 (-1) = 5 - 7 (-1)

⇒ 7 + 5 = 5 + 7

⇒ 12 = 12

∴ LHS = RHS

Hence, the value of x is - 1.

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Extra information -

(-) * (-) = (+)

(-) * (+) = (-)

(+) * (-) = (-)

(+) * (+) = (+)

These things is to be kept in mind while solving such questions.

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