Question

How do you know that a =6 is a solution to a+5=11?

Answer 1

a + 5 = 11

You need to isolate the variable by subtracting from both sides

a + 5 - 5 = 11 - 5

a = 6

The Addition/Subtraction Property of Equality states that if you add or subtract the same number to both sides of an equation the two sides still remain equal.

:))

Answer 2

a + 5 = 11

a + 5 - 5 = 11 - 5

a = 6

hope this helps