Question

How do you evaluate `w-3x+y` if w=6, x=0.4, y=1/2, z=-3?

Answer 1

`color(magenta)(4.3)`

Explanation:

If `color(red)w=color(red)6`
and `color(blue)x=color(blue)(0.4)`
and `color(green)y=color(green)(1/2`

then `color(red)w-3color(blue)x+color(green)y`

`color(white)("XX")=color(red)(6)-3 xx (color(blue)0.4) +color(green)(1/2)`

`color(white)("XX")=5-1.2+0.5`

`color(white)("XX")=3.8 +0.5`

`color(white)("XX")=4.3`