Question

Determine all of the equations that have a solution of x=3

Answer 1

a, b and e

a.

x + 5 = 8 ( subtract 5 from both sides )

x = 3

b

4x = 12 ( divide both sides by 4 )

x = 3

c

$\frac{x}{9}$ = 3 ( multiply both sides by 9 )

x = 27

d

x - 5 = 10 ( add 5 to both sides )

x = 15

e

$\frac{x}{1}$ = 3

note that $\frac{x}{1}$ = x, hence

x = 3