Can somebody help me please

The domain of the expression is all real numbers except where the expression is undefined. In this case, there is no real number that makes the expression undefined.
(
−
∞
,
∞
)
{
x
|
x
∈
R
}
Since
x
is on the right side of the equation, switch the sides so it is on the left side of the equation.
7
x
−
3
2
=
y
Solve for
x
.
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x
=
3
7
+
2
y
7
The range is the set of all valid
y
values. Use the graph to find the range.
(
−
∞
,
∞
)
{
y
|
y
∈
R
}
Determine the domain and range.
Domain:
(
−
∞
,
∞
)
,
{
x
|
x
∈
R
}
for any integer
n
Range:
(
−
∞
,
∞
)
,
{
y
|
y
∈
R
}
I got this from a math website