1. (0.085:0.425)^3=0.008
2. 4.208-0.008=4.2
3. 0.015*4.2=0.063
4. 0.063+2.937=3
5. 3^2=9
4225:65=65
65:5=13
13:13=1
1*13=13(дм в квадрате)
Х+3х+3х+29=155
4х+3х+29=155
7х+29=155
7х=155-29
7х=126
х=126:7
х=18
3 12/13- 1 5/13-1 9/13+2 3/13=51/13-18/13-22/13+29/13=40/13=3 1/13