Respuesta :

XAminatronicsX
3x+7y=213x+7y=21Since 3x3x does not contain the variable to solve for, move it to the right side of the equation by subtracting 3x3x from both sides.7y=−3x+217y=-3x+21Divide each term by 77 and simplify.
survivalyosh
To solve for y, we need to isolate it. Start by moving all of the values on the side the y is on that don't have y to the other side (kind of confusing the way I said it). By that, I mean subtract 3x from both sides:

W = 3x + 7y
W - 3x = 7y

Now, divide both sides by 7 to find the value of y:

W - 3x = 7y
(W - 3x)/7 = y

Hope this helps! :)

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