Question

6. Which of the following equations has a=2 as a solution? a) 2a+4=8 b) 2(a+4)=8 c) 2a-4 =8 d)2(a-4)=8

Answer 1

Answer:

a) 2a + 4 = 8 has a = 2 as a solution.

Step-by-step explanation:

a) 2a + 4 = 8

→ 2a = 8 - 4

→ a = 4/2

→ a = 2

.°. a = 2

b) (a+4) = 8

→ a = 8 - 4

→ a = 4

.°. a ≠ 2

c) 2a - 4 = 8

→ 2a = 8 + 4

→ a = 12/2

→ a = 6

.°. a ≠ 2

d) 2(a-4) = 8

→ 2a - 8 = 8

→ 2a = 8 + 8

→ a = 16/2

→ a = 8

.°. a ≠ 2

By seeing the solutions of the equations given, we get a) 2a + 4 = 8 has a = 2 as the Solution.

Answer 2

$\LARGE{\underline{\purple{\sf{ Answer: }}}}$

a) 2a+4=8 ✔️

b) 2(a+4)=8 ✔️

c) 2a-4 =8 ❌

d)2(a-4)=8❌

$\LARGE{\underline{\purple{\sf{Solution:}}}}$

So , the question is ➜ 6. Which of the following equations has a=2 as a solution?

a) 2a+4=8

b) 2(a+4)=8

c) 2a-4 =8

d)2(a-4)=8

.

Let's see !

a) 2a + 4 = 8

→ 2a = 8 - 4

→ 2a = 4

→ a = 4/2

→ a = 2

----------------------

b) 2(a + 4) = 8

→ 2a + 8 = 8

→ 2a = 8 - 8

→ a = 2

----------------------

c) 2a - 4 = 8

→ 2a = 8 + 4

→ 2a = 12

→ a = 12/2

→ a = 6

So , here a ≠ 2

----------------------

d)2(a-4) = 8

→ 2a - 8 = 8

→ 2a = 8 + 8

→ a = 16/2

→ a = 8

Here also a ≠ 2

--------------------------------

After solving all options we found that

.

In a) 2a+4=8

a = 2

.

In b) 2(a+4)=8

a = 2

.

In c) 2a-4 =8

a ≠ 2

.

And in d)2(a-4)=8

a ≠ 2

____________________