Question

For the two - variable equation y - 3x = 15 find the matching y value when x = 1/3

Answer 1

Please help i give medals

Answer 2

x = 1/3

means that we can replace "x" with "1/3" whenever x shows up

Answer 3

so, if

y - 3x = 15

and x = 1/3

what is y equal to?

Answer 4

i dont know im having trouble:(

Answer 5

easier question

if x = 1/3, what is 3x?

Answer 6

The statement:

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


means that wherever you see the variable x

you can replace it with the number 1/3.

This is called the substitution principle:

An expression maybe replaced by

another expression that has the same value.

So, x = 1/3 is saying that x and 1/3 have the same value,

that means x can be replaced by 1/3.

Answer 7

This is why we can replace 4 + 2 with 6

in the statement 4 + 2 = 6

and get the true statement 6 = 6,

because 4 + 2 and 6 have the same value.