Show all your work and how u know its the right answer

6x - 3 = 21

6x-3=21

6x-3 (+3) = 21 (+3) * to cancel 3 out & what

you do to something

on one side of the

equal side you need

to do to the other*

6x=24

6x (divide 6) = 24 (divide 6) * to cancel the

6 out,

because you

want x by

itself

x = 4

x=4

Step-by-step explanation:

6x-3=21

+3 + 3 add three to both sides to get the coefficient on its own side

6x=24 (whenever we do something to one side, we do it to the other.)

:6 : 6 divide both sides by 6 to get our variable (x) alone

x=4 6x/6=x 24/6=4