Question

Will fan & medal!
What is the value of y when x = 3?

y = 12x
http://prntscr.com/7a9htj

Answer 1

replace x in the equation by its value
y=12x
y=12(3)=?

Answer 2

The symbol "=" can be read as "is",

so the question is asking:

what is y when x is 3.

A variable expression, in this case 12•x,

can be evaluated by

replacing each variable, ie x

with a given value, the question gives you the value of 3,

and simplifying

the resulting numerical expression. That is, simplify 12•3.

The answer you get for 12•3 will be the value for y when x is 3,

Because the question states that $$\Huge y=12•x$$