Question

FIND THE VALUE OF X

$(5x + 1)(x + 3) - 8 = - 5(x + 1)(x + 2)$
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Answer 1

Given :

(5x + 1) (x + 3) -8 = -5(x + 1) (x +2)

To find :

Value of x

Solution :

⇛ (5x + 1) (x + 3) -8 = -5(x + 1) (x +2)

⇛ (5x² + 15x + x + 3) -8 = -5(x² + 2x + x + 2)

⇛ 5x² + 16x + 3 - 8 = -5(x² + 3x + 2)

⇛ 5x²+ 16x - 5 = -5x² + 15x +10

⇛ 16x - 15x = -15

⇛ x = -15

Answer 2

Correct Expression :-

$\sf{(5x + 1)(x + 3) - 8 = 5(x + 1)(x + 2)}$

How To Solve?

Multiply the Numbers and then add or Subtract them.

To Find :-

The Value Of x.

Solution :-

➛ $\small\sf{5 {x}^{2} + 15x + x + 3 - 8 = 5( {x}^{2} + 3x + 2)}$

Add the Terms On L.H.S. and Multiply the terms on R.H.S.

➛ $\sf{ {5x}^{2} + 16x - 5 = 5 {x}^{2} + 15x + 10 }$

Use Transposition.

➛ $\sf{ 5 {x}^{2} - 5 {x}^{2} + 16x - 15x = 10 + 5}$

Add or Subtract them.

➛ $\underline{\boxed{\bf\red{x = 15}}}$

Hence, Value Of x = 15.