# How do you solve -0.3x+5.19=-2.31?

Feb 11, 2017

$x = 25$

#### Explanation:

Isolate - 0.3x on the left side by subtracting 5.19 from both sides of the equation.

$- 0.3 x \cancel{+ 5.19} \cancel{- 5.19} = - 2.31 - 5.19$

$\Rightarrow - 0.3 x = - 7.5$

To solve for x, divide both sides by - 0.3

$\frac{\cancel{- 0.3} x}{\cancel{- 0.3}} = \frac{- 7.5}{- 0.3}$

$\Rightarrow x = 25$

$\textcolor{b l u e}{\text{As a check}}$

Substitute this value into the left side and if equal to the right side then it is the solution.

$\left(- 0.3 \times 25\right) + 5.19 = - 7.5 + 5.19 = - 2.31$

$\Rightarrow x = 25 \text{ is the solution}$