13-9 3/4:x=3 4/5
13-39/4*1/x=19/5
13-39/4x=19/5
-39/4x=19/5-13
-39/4x=-46/5
-195=-184x
-184x=-195
x=1 11/184
1)x=1 2)х = 7/13 3)х = -8/5
<span>4*(x-0,5)+2*(x-0,25)+x-0,125=0
4x-2+2x-0,5+x-0,125=0
4x+2x+x=2+0,5+0,125
7x=2,625
x=0,375</span>
64000-900=х х=63100
у=65037-320 у=64717