10x plus 20 equals

Depends on the value of x

if x is 1 then 10x + 20 = 30

if x is 2 then 10x + 20 = 40

if x is 3 then 10x + 20 = 50

if x is 4 then 10x + 20 = 60

if x is 5 then 10x + 20 = 70

if x is 10 then 10x + 20 = 120

And so on