Simplify x - 9 - 3x

explain how, i'm seriously confused

combine like terms:

-3x+x

add:

-3x + x

NOTE: remember that x virtually equals 1

so -3*1+1=-1

hence, simplified x - 9 - 3x

= -2x-9

Helpful Information:

You  should also note that when combining like terms, remember that the sign before the number goes w/ the number...for example: in the expression x-9-3x, x is positive b/c it doesn't have a negative sign or anything fancy before it. We can say 9 is negative or use it to subtract since it has a minus sign before it. -3x, 3 has a minus sign so we say it's negative.

x+-3x

1+-3*1

1+-3

=-2

step-by-step explanation:

the true statements are:

r = set of real numbers

n = set of natural numbers, 1,2,

w = n u{0} = {0,1,}

answer: on graphs, the open and closed circles, or vertical asymptotes drawn as dashed lines us identify discontinuities.

as before, graphs and tables allow us to estimate at best.

when working with formulas, getting zero in the denominator indicates a point of discontinuity.

when working with piecewise-defined functions, check for discontinuities at the transition points where one piece ends and the next begins.

step-by-step explanation: