1/3x+1/4x+1/8x=34/45 3 3/4x-1 2/3=2 11/12 4 2/15-3 - вопрос №46355721314183445334123211124215319145415213781 от WTFHELP 14.10.2020 17:41

Question

Математика: 1/3x+1/4x+1/8x=34/45 3 3/4x-1 2/3=2 11/12 4 2/15-3 1/9x=1 4/5 4/15x+2 1/3=7 8/15

WTFHELP · Answer

1) 8/24x+6/24x+3/24=34/45
17/24x=34/45
x=34/45:17/24=34/45*24/17=16/15=1 1/15
2) 3 3/4x-1 2/3=2 11/12
3 3/4x=2 11/12-1 2/3=2 11/12-1 8/12
15/4x=15/12
x=15/12:15/4=15/12*4/15=1/3
3) 4 2/15-3 1/9x=1 4/5
3 1/9x=4 2/15-1 4/5=4 2/15-1 12/15=3 17/15-1 12/15
28/9x=35/15
x=35/15:28/9=35/15*9/28=3/4
4) 4/15x+2 1/3=7 8/15
4/15x=7 8/15-2 1/3=7 8/15-2 5/15=5 3/15=5 1/5
4/15x=26/5
x=26/5:4/15=26/5*15/439/2=19 1/2