Question

Which equation does not have the same solution as the others?

x/4 = 2
x - 9 = 17
x + 12 = 20
2x = 16

Answer 1

solve all equations for x

Answer 2

if number are subtracting with variable x
then do opposite which is add so add that number both side
if number are multiplying by variable on left side so do opposite which is divide both side by that number

subtraction <--->addition
division <----> multiplication