Помоги мне ,,,,,,,,,,,,,
1)m*0.75=15 m=15:0.75 m=20 15-x=2.56 x=15-2.56 x=12.44 2.56:n=3.2 n=2.56:3.2 n=0.8 2) a*2.6=27.04 a=27.04:2.6 a=10.4 27.04+b=30 b=30-27.04 b=2.96 30:c=125 c=30:125 c=0.24