4 (5x - 5) = 0 solve it i got

20x-20=0 i just need the rest

Add 20 to both sides of the equal sign. this will turn it into 20x=20. then you divide both sides of the equal sign by the number with the exponent (x, y etc) so it would be 20/20 x=1

I'm pretty sure 5x - 5 is 0 and 4x0 is 0