Hi :)
Let's make
the subject of the formula. This is exactly the same as solving the equation for
.
This is how we'll go about finding
:
W=2a+3b
Let's get 2a out of the way by subtracting both sides by
:
W-2a=3b
Now just divide the whole equation by


We can turn this around. It won't change anything, as long as these two sides are equal

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