How do i work out this problem: f-7.8=

Are you taking pre-algebra? If you are taking beginning algebra 7.8 is added to both sides to solve for f.

Your answer would be +7.8 instead of -7.8 on the other side of the equation.
When you have equations where you need to solve for a variable always add or subtract from one side. For example
if your equation is x+10-4x=14 first collect like terms. There is only one whole number in the equation so subtract that first. So now the equation is x+10-10-4x=-10+37. Now collect variables. There is a single x which is = to one. add the x to 4x. This will then be -3x. So now the equation is 10-10-3x= 37-10. 10-10 is 0. Now to solve for x divide both sides by three. 37-10 is 27. 27/3=7

If you are on another chapter that is talking about beginning equation let me know.

Fractions are confusing at times. Let us know if fractions are stumping you.

5y-10= -5

To work out the given problem, f-7.8=, we need to isolate the variable "f" on one side of the equation. Follow these steps to solve for "f":

Step 1: Simplify the equation by removing any unnecessary terms.
Since there is no value or variable on the right side of the equation, we can rewrite it as f - 7.8 = 0.

Step 2: Add 7.8 to both sides of the equation to isolate the variable "f".
Starting with f - 7.8 = 0, add 7.8 to both sides:
f - 7.8 + 7.8 = 0 + 7.8
Simplifying the equation, we get:
f = 7.8

Step 3: Verify the solution by substituting the value of "f" back into the original equation.
Plugging in f = 7.8 into the equation f - 7.8 = 0, we have:
7.8 - 7.8 = 0
Simplifying, we find:
0 = 0

Since the equation is true, we can conclude that the solution to the equation f - 7.8 = 0 is f = 7.8.