Question

A=3b= -4c = 122(a + b)

Answer 1

Let's evaluate the expression

`2(a+b)`

when a=3, b=-4 and c=12.

Then

`\begin{gathered} 2(3-4)=2(-1) \\ =-2 \end{gathered}`

Therefore, the expression has a value of -2 for those values of the variables.