Question

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

Answer 1

`x=25`

Explanation:

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

`-0.3xcancel(+5.19)cancel(-5.19)=-2.31-5.19`

`rArr-0.3x=-7.5`

To solve for x, divide both sides by - 0.3

`(cancel(-0.3) x)/cancel(-0.3)=(-7.5)/(-0.3)`

`rArrx=25`

`color(blue)"As a check"`

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

`(-0.3xx25)+5.19=-7.5+5.19=-2.31`

`rArrx=25" is the solution"`