How do you solve #c -6.81= - 5.71#?

1 Answer
Mar 24, 2018

c = 1.1


The key to solving this is to isolate the variable on one side of the equation.

C is the variable. To isolate it, we've got to get it alone on either side of the = sign.

The easiest way to do that here is to add 6.81 to both sides of the equation. Remember that anything done on one side of the equation (or equal sign) must be done on both sides to maintain balance.

Think of - 5.71 as you owing a friend $5.71.
If you find $6.81 cents in your pocket, you can pay that friend back their $5.71, subtract it from your $6.81 and still have $1.10 remaining. 1.10 is equal to 1.1, and that's the answer.