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STALIN [3.7K]
2 years ago
9

W = 3x + 7y solve for y

Mathematics
2 answers:
andrew-mc [135]2 years ago
3 0
<span><span>3x+7y=21</span><span>3x+7y=21</span></span>Since <span><span>3x</span><span>3x</span></span> does not contain the variable to solve for, move it to the right side of the equation by subtracting <span><span>3x</span><span>3x</span></span> from both sides.<span><span>7y=−3x+21</span><span>7y=-3x+21</span></span>Divide each term by <span>77</span> and simplify.
zlopas [31]2 years ago
3 0
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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