Упростите выражение:4а+90а,86b-77b,209m+m,302n-n решите уравнения 14x+27x=656 81y-38y=645 49z-z=384 102k-4k=1960
4а+90 а = 94а 86b-77b=9b 209m+m = 210m 302n-n=301n 1.14x+27x=656 14x+27x = 41x x=656:41 = 16 2. 81y-38y= 645 81y-38y=43y y=645:43 = 15 3.49z-z=384 49z-1z=48z z=384:48 = 8 4. 102K-4k=1960 102k-4k=98k k=1960:98 = 20
4а+90а=94а 86б-77б=9б 209м+м=210м 302н-н=301н $$$$$$$$$$$$$$ 14х+27х=656 41х=656 х=656÷41 х=16 $$$$$$$$$$$$$$$ 81у-38у=645 43у=645 у=645÷43 у=15 $$$$$$$$$$$$$$$$ 49z-z=384 48z=384 z=384÷48 z=8 $$$$$$$$$$$$$$$$ 102k-4k=1960 98k=1960 k=1960÷98 k=20 $$$$$$$$$$$$$$$$$