Question

Срочно ....помогите пж

Answer 1

-2/15-1 7/12=-8/60-1 35/60=-1 43/60
-1 43/60*30/103=-103/60*30/103=-1/2
2:2 1/4=2:9/4=2*4/9=8/9
8/9*9/32=1/4
-1/2+1/4=-2/4+1/4=-1/4

1 2/3x+5/6x=2 1/2+7/12-4 1/4
1 4/6x+5/6x=2 6/12+7/12-4 3/12
1 9/6x=3 1/12-4 3/12
2 3/6x=-1 2/12
2 1/2x=-1 1/6
x=-1 1/6:2 1/2      1 1/6:2 1/2=7/6:5/2=7/6*2/5=7/15
x=-7/15

24x-15x=-100-8
9x=-108
x=-108/9
x=-12
-45x-94x=-341-76
-139x=-417
-x=-417/139
-x=-3
x=3