Question

Evaluate the following expression using the values given:
3x - y - 3z if x = -2, y = 1, and z = -2.

Answer 1

Plug in the numbers:
3 x -2 - 1 - 3 x -2
Use your calculator to multiply all of them:
So your answer is -1.

Answer 2

place the no. in place of x, y and z.. then,
3x-y-3z
= 3(-2)-1-3(-2)
=-6-1+6
=-1