Question

0.2x(5x-8)+3.6=x(x-0.7)

Answer 1

0.2x(5x-8)+3.6=x(x-0.7)
x^2-1,6x+3,6=x^2-0,7x
0,9x=3,6
x=4

Answer 2

0.2x(5x-8)+3.6=x(x-0.7)
х²-1,6х+3,6=х²-0,7х
-1,6х+0,7х=-3,6
-0,9х=-3,6
х=-3,6:(-0,9)
х=4