<span>1,8k+2,35+4,3k+1,4k = 1,8 * 1,5 + 2,35 + 4,3 * 1,5 + 1,4 * 1,5 = =2,7+2,35+6,45+2,1=13,6
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1) 12,41 + 8,39 = 21
2) 21/1 × 3/2 = 63/2
3) 11/5 - 63/2 = 22 - 315 / 10 = -293/10= -29,3
.............= - 7а+15 - 1+2,5а - 3,2а - 12= - 7,7а+2
при а=5/7
- 7,7*5/7 +2= - 77/10 * 5/7 +2= - 11/2 +2= - 5,5+2= - 3,5
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8m+5p-13m-p=4p - 5m
k-(17-k)+(-k+30)=k -17+k - k -30=k - 47
-6(4+a)+8(a-6)= - 24 - 6a+8a - 48=2a - 72=2(a-36)