Question

A number is doubled and then increased by seven. The result is ninety three. What is the origonal number

Answer 1

$\hbox {Let x - to be your number.}$

$2x+7=93$ ⇒ $2x=93-7$ ⇒ $2x=86$

$x= \frac{86}{2}$ ⇒ $\boxed {x=43}$

Answer 2

Subtract 7 from both sides
2 . x = 86 Divide both sides by 2
X = 43