(1,6*2,43-2,43):(3,57-3,75)-0,81=8.91
1) 1.6*2.43=3.888
2) 3.888-2.43=1.458
3) 3.57-3.75=-0.18
4) 1.458:(-0.18)=-8.1
5) -8.1-0.81=-8.91
1)-7/11*1 5/17=-7/11*22/17=-14/17
2)-14/17:0,75=-14/17:3/4=-14/17*4/3=-56/51=-1 5/51
243,68+256,32:(27,9-26,3) = 243,68+256,32:1,6 = 243,68+160,2 = 403,88
<span>9х^2 -6х+ 1-9х^2 +12х-4=0; 6х=3; х =1/2</span>
18/5 + 8/7 : 5/28 = 18/5 + 8/7 • 28/5 = 18/5 + 32/5 = 50/5 = 10