4x + y = 10 is a perfectly valid functional form. The standard form is 4x + y - 10 = 0
x + y = -2 y = -x - 2 f(x)= - x -2
Yes it is a function. In standard form it is y=x-4.
$48x + 5y" is an expression. It is not a function and so cannot be written as a function.
It is: y = -2/3x+4 in slope intercept form
y = x + 7
y = -x-2
y(x) = (4 - x)/4.
y=3x+12
f(x) = 2x2 + 4x - 7
y = (c - Ax) / (B)
two hundred plus fifty plus five equals two hundred fifty-five