47+x=74. y-50=104. 10+z=10. x-5000=316
x=74-47. y=104+50. Z=10-10. x=5000+316
x=27. y=154. z=0. x=5316
378 + х + 122
если х = 254, то: 378 + 254 + 122 = 754
10720-6020=4700л в1й
10720-7870=2850л во 2й
10720-4700-2850=3170 в 3й
<span>а)-5.7+(-13,2)-(-6,2)-(+1,3)= -5,7-13,2+6,2-1,3=-18,9+6,2-1,3=-12,7-1,3=-14
</span><span>б)-14,63+(-7,49)-(-11,98)=-14,63-7,49+11,98=-22,12+11,98=-10,14</span>
5/8-(1/4+1/3)=15/24-(6/24+8/24)=1/24