To solve for \( a \) in the equation \( 20 + 10a = 4 \), follow these steps: 1. Subtract 20 from both sides of the equation: \[ 10a = 4 - 20 \] \[ 10a = -16 \] 2. Now, divide both sides by 10: \[ a = \frac{-16}{10} \] 3. Simplify the fraction: \[ a = \frac{-8}{5} \] So, the solution is: \[ a = -\frac{8}{5} \] or \(-1.6\) as a decimal.

20+10a

=
4

a
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1 answer

To solve for \( a \) in the equation \( 20 + 10a = 4 \), follow these steps:

Subtract 20 from both sides of the equation:

\[ 10a = 4 - 20 \]

\[ 10a = -16 \]
Now, divide both sides by 10:

\[ a = \frac{-16}{10} \]
Simplify the fraction:

\[ a = \frac{-8}{5} \]

So, the solution is:

\[ a = -\frac{8}{5} \] or \(-1.6\) as a decimal.