С:14+45=50
с:14=50-45
с:14=5
с=14×5
_с=70____________
Ответ: 70
15/18 (т.к. 7/9 = 14/18, а 8/9 = 16/18) и 22/27 (7/9 = 21/27, 8/9 = 24/27)
1)9*2+9*m=18+9m
2)-3*1,5+(-3)*n=-4,5-3n
3)2,8*3-2,8*m=8,4-2,8m
4)-1,5*2-(-1,5)*n=-3+1,5n=1.5n-3
5)4*1,2-4*m=4,8-4m
6)1,3*n-1,3*5=1,3n-6.5
53940<span>÷56=963,2
85282</span><span>÷79=1079,5
555555</span><span>÷834=666,1
285140</span><span>÷472=604,1</span>