Set the equation equal to zero.
3x2 - x = -1
3x2 - x + 1 = 0
The equation is quadratic, but can not be factored. Use the quadratic equation.
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5x - 16 = 3x2x - 16 = 02x = 16x = 8
x = 1/3
the answer is 6
To solve for 2 unknown variables you need 2 independent equations. You have only 1.
First you put -6 under 6 so they cancel each other out. The do 7 - 6 which equals 1. So x equals 1