A-6/3 = -7 pls help i will give brainlist

Follow these steps using the algebra tiles to solve the equation −5x + (−2) = −2x + 4. 1. add 5 positive x-tiles to both sides and create zero pairs. 2. add 4 negative unit tiles to both sides and create zero pairs. 3. divide the unit tiles evenly among the x-tiles. x =

Ineed in figuring out this problem.

Find the center and the radius of the circle with the equation: x^2-2x+y^2+4y+1=0?