Question

упростите выражение x-(2y-3)-(x+5y-7)-12

Answer 1

x-(2y-3)-(x+5y-7)-12=x-2y+3-x-5y+7-12=-7y-2

Answer 2

x-(2y-3)-(x+5y-7)-12=x−2y+3−x−5y+7−12= −2y−2−5y= −7y−2