14 х =28
х=28:14
х=2...............................................................
<span>36*28+36*39-67*46=36*(28+39)-67*46=36*67-67*46=67*(36-46)=67*9-10)= -360
Ответ: -360</span>
1)2/3-1/15=9/15
2)9/15+4/5=21/15=7/5
<span>X·32-123=3013</span>
<span>32х=3013+123</span>
<span>32х=3136</span>
<span>х=98</span>
<span><span> c·210-900=12750</span></span>
<span><span>210с=12750+900</span></span>
<span><span>210с=13650</span></span>
<span><span>с=65</span></span>
<span><span><span>4860-R·62=2442</span></span></span>
4860-2442=62r
2418=62r
r=39
<span> 91260-320·b=74620</span>
<span>91260-74620=320в</span>
<span>16640=320в</span>
<span>в=52</span>
5×13=65 (грн)
Ответ: 65 гривен