1.6Х+2=10Х-12
2+12=10Х-6Х
14=4Х
Х=14:4
Х=3,5
2.6*3,5+2=10*3,5-12
23=23
1 км = <span>1000000</span>
<span><span>134985678</span>·<span>1000000=134985678000000 мм</span></span>