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(x-5)(x+3)
By definition: 4x-10 = 5-x 4x+x = 5+10 5x = 15 x = 3 and y = 2
In order to solve for X, or find out what X equals, you need to get the X alone on one side of the equation. In this case, first you subtract the Y so that the equation becomes 5x=10-y. Then you divide both sides by 5. Now the equation is X=(10-y)/5 (or X equals the quantity of 10-y over 5).
X=6
y=5-x