Question

what should be the value of a in the equation 2x + x -a =5 . when the value if x =0​

Answer 1

Answer:

a= -5 ans

Step-by-step explanation:

2(0)+0-a=5

0-a=5

a=-5

Answer 2

Given:

The equation:-

• 2x + x - a = 5

The value of x:-

• x = 0

What To Find:

We have to find the value of a where x = 0.

Solution:

2x + x - a = 5

Substitute the value of x,

⇒ 2 × 0 + 0 - a = 5

Multiply 2 by 0,

⇒ 0 + 0 - a = 5

Add 0 and 0,

⇒ 0 - a = 5

Omit the zero,

⇒ -a = 5

-a can be written as -1a,

⇒ -1a = 5

Take -1 to RHS,

⇒ $\sf{a = - \dfrac{5}{1}}$

-5 by 1 can be written as -5,

⇒ a = -5

∴ Hence the value of a is -5.

Verification:

2x + x - a = 5

Substitute the value of x and a,

⇒ 2 × 0 + 0 - (-5) = 5

Multiply 2 by 0,

⇒ 0 + 0 - (-5) = 5

Add 0 and 0,

⇒ 0 - (-5) = 5

Subtract -5 from 0,

⇒ 5 = 5

∴ LHS = RHS

∴ Hence, verified.