Question

What is the value of x in the equation 5 − 3x = −7?

Answer 1

Given :

• 5 − 3x = −7

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To Find :

• The required value of x .

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Solution :

`\qquad \sf \: { \dashrightarrow 5 - 3x = - 7}`

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Adding (–5) to both sides :

`\qquad \sf \: { \dashrightarrow 5 + ( - 5) \: − 3x = −7 + ( - 5)}`

`\qquad \sf \: { \dashrightarrow \: − 3x = - 12}`

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Dividing both sides by 3 :

`\qquad \sf \: { \dashrightarrow ( - 3x)/(3) = ( - 12)/(3) }`

`\qquad \sf \: { \dashrightarrow − x = −4}`

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Cancelling (–) from both sides we get :

`\qquad {\pmb {\bf{ \dashrightarrow x = 4}}} \\`

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Therefore, The required value of x is 4.

Answer 2

Explanation:

5 − 3x = −7

=> 5 + 7 = 3x

=> 12 = 3x

`= > x = (12)/(3)`

=> x = 4 (Ans)