371:х=7
Х=371:7
Х=53
(22-14)х=112
8х=112
Х=112:8
Х=14
2log2(7)*(0,5)log20,5=0,3×7×0,5×2,3=3,511
(3*b+160)/7 = 40
3b+160=280
3b=280-160
3b=120
b=40
ответ:40
631×2×5=6310
8×25×4=800
37×50×2=3700
86×50×2=8600
31×20×500=310 000
27×4×250=27 000
19×1000=19 000
15×2×5=150
67×4×25=6700