РЕШЕНИЕ
1 1/4 * 2/5 - 1/3 = 5/4 * 2/5 - 1/3 = 1/2 - 1/3 = (3-2)/6 = 1/6 - ответ.
у=0,1х+5.Для х=10 у=0,1·10+5=1+5=6х=50 у=0,1·50+5=5+5=10х=120 у=0,1·120+5=12+5=17
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1) 2x+2×3=2x+6
2) 5×6-5a=30-5a
3) 7x-3×7=7x-21
4) 5×4+4a=20+4a
5) 5y-2×5=5y-10
6) =3a+3