(65-у)+19=48
84-у=48
у=84-48
у=36
(65-36)+19=48
<span>1/3х+7/8-7/9 = 1.5/24-2.1/8 +1/4х
1/3x+7/72=-11/12+1/4x
1/3x-1/4x=-11/12-7/72
1/12x=-73/72
x=-73/72:1/12
x=-12 1/6
</span>
12.3/6=6*0.8x
12.3*56=6*0.8x
688.8=4.8x
x=688.8/4.8
x=143.5
17.14; 17.12; 17.1995; 17.173 ...
<span>7х+2у=9/*(-1)</span>
<span>5х+2у=11</span>