Question

найти значение вырожкния 10x-8yприx_=3/5,y=5/8

Answer 1

10х - 8 у = 2(5х - 4у)
При х = 3/5, у = 5/8
2(5 * 3/5 - 4 * 5/8) = 2(3 - 5/2) = 2(3 - 2,5) = 2 * 0,5 = 1.