1411-(x+114)=1411-x-114=1297-x. X=98 1297-98=1199
X=107 1297-107=1190
X=65 1297-65=1232
147+x-47=100+x
X=87 100+87=187
X=79 100+79=179
1
100*x=2430-2030
100*x=400
x=400:100
<u>x=4</u>
100*4=400
x=4
2
100:x=2430-2420
100:x=10
x=100:10
<u /><u /><u /><u /><u>x=10</u>
100:10=10
x=10
8 9/8 + 2 18/11 - 3 1/4 = 73/8 + 40/11 - 13/4 =(73 × 11 + 40 × 8 - 13 × 22)/88 = 803/88 + 320/88 - 286/88 = 837/88 = 9 45/88
18^n/(3^(2n-1)*2^(2n-2))=2^n*9^n/(3^(2n-1)*2^(2n-2))=2^n*3^2n/(3^(2n-1)*2^(2n-2))=2^(n-2n+2)*3^(2n-2n+1) =2^(2-n)*3.
5648:8=56:8 и 48:8=76
1632:8=16:8 и 32:8=24
6321:7=63:7 и 21:7=93
45027:9=450:9 и 27:9=5003
54036:6= 540:6 и 36:6=9006
32072:8=320:8 и 72:8=4009
35025:5=350:5 и 25:5=7005
72081:9=720:9 и 81:9=8009
36045:9=360:9 и 45:9=4005