How do you solve and check your solution given #-3.4=0.4x#?
... see below :)
When it says to solve, it means to find what the unknown variable equals to. So you want to isolate x to find what x is.
To check if what we got is correct, we can input the answer back into the equation. So since we found that x=-8.5, we want to replace x with -8.5
The left side is equal to the right side, so therefore we know that our answer is correct.
Find a value for
We are told
Therefore, to begin, we need find a value for
To check we substitute the values of