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If you would like to solve the equation a = 2 + 3a + 10, you can do this using the following steps:

a = 2 + 3a + 10
-2 - 10 = 3a - a
-12 = 2a    /2
a = -6

The correct result would be -6.

Answer:

Option 3rd is correct

a = -6

Step-by-step explanation:

Given the equation:

[tex]a = 2+3a+10[/tex]

Like terms are those terms which have same variable to the same power.

Combine like terms we have;

[tex]a = 12+3a[/tex]

Subtract 3a from both sides we have;

[tex]a-3a = 12+3a-3a[/tex]

Simplify:

[tex]-2a = 12[/tex]

Divide both sides by 2 we have;

[tex]a = -6[/tex]

therefore, the value of a is, -6

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