Evaluate the expression 12 - 3y
12 - 3V+ 12Y = 4 for y = 3.

v=7

Step-by-step explanation:

You want to write your equation and it should look like this:

12 - 3V+ 12Y = 4

next you wanna plug in y which in this case it is 3 now your equation should look like this:

12 - 3V+ 12(3) = 4

next you wanna multiply 12 and 3 so keep everything the same your new equation should look like this:

12 - 3V+ 36 = 4

now you wanna combine like terms and the like terms here would be 12 and 36 so you wanna subtract 12 from 36 to get you 24 and your new equation should look like this:

3V+ 24 = 4

next you want to subtract 24 from 4 and it should look like this:

3V= -20

now you want to get the variable by itself and you can do that by dividing 3 from -30 and your new equation should look like this:

v=-6.666666666666667

but you cant submit that so you wanna say v=7

(23*2)-12=x     x=34

step-by-step explanation: