Раскройте скобки и приведите подобные слагаемые:
1.5(8х-6у)-(5у-3х)*2.4
-(4.3х-2.4)-(5.8-2.6х)
8/15(3целых 3/4м-5/16)-3/20(6 целых 2/3м- 4целых 4/9n)
1.5(8х-6у)-(5у-3х)*2.4
-(4.3х-2.4)-(5.8-2.6х)
8/15(3целых 3/4м-5/16)-3/20(6 целых 2/3м- 4целых 4/9n)
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1.5(8x -6y)-(5y-3x)*2.4=12x - 9y-12y+7.2x=19.2x - 21y-(4.3x -2.4)-(5.8 -2.6x)= - 4.3x+2.4-5.8+2.6x= - 1.7x - 3.4= - 1.7(x+2)
8/15 *(3 3/4 m -5/16n)-3/20*(6 2/3 m - 4 4/9n)=8/15 * 15/4 m - 8/15*5/16 n - 3/20 *20/3 m+3/20 * 40/9 n=2m -1/3n - m +2/3n=m+1/3 n