Five added to a number is equal to 8 subtracted from twice the number. Find the number.
15
13
12
17
The given statement can be expressed as
x + 5 = 2x - 8
⇒ 2x - x = 8 + 5
⇒ x = 13
Twelve added to a number is equal to 10 subtracted from twice the number. Find the number.
Four times a number added to thrice another number gives 43. Twice the second number, subtracted from thrice the first gives 11. What are the numbers?