Question

Evaluate the multi-variable expression 12x-3y when x=2 and y=3

Answer 1

15

Explanation:

substitute x = 2 and y = 3 into the expression

12x - 3y

= 12(2) - 3(3)

= 24 - 9

= 15

Answer 2

Expression: 2a - b + c

a = 3, b = 4, c = 10

To evaluate such expression, all we have to do is substitute these values to the expression like this:

`\begin{gathered} 2a-b+c \\ =2(3)-4+10 \\ =6-4+10 \\ =2+10 \\ =12 \end{gathered}`

Therefore 2a + b - c = 12 if a = 3, b = 4, and c = 10.