The derivative of 2x2 + 4x + 8 is 4x+4.
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If: 4x+(-12) = 8 then 4x = 20 and x = 5
x=5
Simplify 4x + 3 = 2x + 8 2x = 5 x =2½
x=3
Only if 4 dollars plus 4 dollars equals 8 dollars.And if you had another 4x, you'd have a dozen-x.