Question

When you solve an equation, how do you know when to add and when to subtract? You may include an example if you need to.

subtract 6.2 from both sides.

add 6.2 to both sides.

subtract 7.1 from both sides.

add 7.1 to both sides.

Answer 1

if you are trying to undo addition, you subtract

ex

x + 3 = 5

you are trying to undo the plus 3

Answer 2

if you are trying to undo subtraction, you add

Answer 3

ex

x- 3 =5

you add 3 to both sides