Question

1) 1/3x+1/4x+1/5x=1 19/75

Answer 1

1) 13Х + 14Х + 15Х = 2060X + 1560X + 1260X = 4760X
2) 1 1975 = 9475
3) 4760X = 9475
    47X * 75 = 94 * 60
    3525X = 5640
    X = 1.6
    

Answer 2

1/3x+1/4x+1/5x=1 19/75
20х/60+15х/60+12х/60=94/75
47х/60=94/75
НОК=300
235х=376
х=376 : 235 = 1,6
х=1,6