Multiply this difference by 4, and you get 64 as the result. So:
64 = 4(a - 44)
Now you need to balance the equation. Do the same operation to both sides. To begin, divide both sides by 4.
64/4 = 4(a - 44)/4 becomes
16 = a - 44 To get variables on one side and numerals on the other, add 44 to each side.
16 + 44 = a
60 = a. Sarah is 60 years old.
