Question

Check whether the given number is a solution of the equation. $$12-2 a=18 ; 4$$

Short answer

No, the number \(4\) is not a solution of the equation \(12 - 2a = 18\).

Step-by-step solution

Substitute the given number in place of \(a\) in the equation

Substitute \(4\) for \(a\) in the equation \(12 - 2a = 18\). This gives us \(12 - 2(4) = 18\).

Simplify the equation

Now, simplify the left-hand side of the equation: \(12 - 8 = 4\). So, the equation now reads \(4 = 18\).

Check for equality

Here we can see that both sides of the equation are not equal. \(4\) does not equal \(18\). Therefore, \(4\) is not a solution to the equation \(12 - 2a = 18\).