I will mark brainest if it right
1. 20x - 15 = 19x -14
x=

Is this a polynomial function? i need to know asap

Isabel graphed the following system of equations. 2x – y = 6 y = -3x + 4 she came up with the solution (2,-2). what were the 3 steps she did to get that solution? (make sure they are in the correct order)

Rationalize the denominator- 12x/√x-10