4х +10=70
4х=70-10
4х=60
х=60/4
х=15
4(15+2,5)=4*17,5=70
<span>17(3c+5d)+6c+28d =
</span><span>51c+85d+6c+28d =
</span>57c+113d =
57(с+d) +56d =
57*2 +56d=
114 +56d
1,05+0,580431*0,4-0,05-0,580331*0,4=
<span>1+0,4*(0,580431-0,580331)=1+0,4*0,001=1+0,00004=1,00004</span>
120 кг-1200000гр.
2г
на ско-ко меньше=120000-2=119998г
на 199.998кг.