x=36
From superscot85: It does not!
2x + 7 = 79
Subtract 7 from each side: 2x = 72
Divide each side by 2: x = 36
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21
2x + 5 = 25 2x = 20x = 10
x = 0 and y = 4
It is a linear equation in x. The equation has the solution x = 0.
No. It is a quartic equation. The largest power of x in a quadratic equation must be 2.