Odpowiedź:
[tex]a)\\x+7 = -2\\x = -2-7\\x= -9\\\\b) \\x-15 =1\\x = 1+15\\x=16\\\\c)\\21+x=5\\x=5-21\\x=-16\\\\d)\\34 = x-2\\34+2 = x\\x=36\\\\e) \\x-9 =-1\\x= -1+9\\x=8\\\\f)\\-2,5 +x = -3,7\\x = -3,7 +2,5\\x=-1,2\\\\g)\\x-19 = -11\\x= -11+19\\x = 8\\\\h)\\x+(-12) = 1\\x=1+12\\x=13[/tex]
