Question

выполните действия 4/9(2.7m-2 1/4n)-4.2(5/7m-0.5n)

Answer 1

4/9(2.7m-2 1/4n)-4.2(5/7m-0.5n)=4/9x2.7m-4/9x2 1/4n-4.2x5/7m+4.2x0.5n=6/5m-n-3m+21/10n=6/5m-15/5m-1n+2 1/10n=-9/5m+1 1/10n=1 1/10n-1 4/5m