Решите уравнения а) d+1/5=4/7+3/7 f+4/5=4/7+3/7 - вопрос №504462215473745473725473745972 от solodovnikovay124 24.07.2020 06:58

Question

Математика: Решите уравнения а) d+1/5=4/7+3/7 f+4/5=4/7+3/7 b+2/5=4/7+3/7 б) c-459=725+275 x-459=725-275 459-z=725-275 в) y: 5=250x2 r: 100=250x2 m: 5=250x3

solodovnikovay124 · Answer

А) d + 1/5 = 4/7 + 3/7d + 1/5 = 7/7 = 1d = 1 - 1/5 = 4/5f + 4/5 = 4/7 + 3/7f + 4/5 = 7/7 = 1f = 1 - 4/5 = 1/5b + 2/5 = 4/7 + 3/7b + 2/5 = 7/7 = 1b = 1 - 2/5 = 3/5б) c - 459 = 725 + 275c - 459 = 1000c = 1000 + 459 = 1459x - 459 = 725 - 275x - 459 = 450x = 450 + 459 = 909z = 725 - 275 = 450в) y : 5 = 250 * 2y : 5 = 500y = 500 * 5 = 2500r : 100 = 250 * 2r : 100 = 500r = 500 * 100 = 50000m : 5 = 250 * 3m : 5 = 750m = 750 * 5 = 3750...