238+х:8=265;
х:8=265-238;
х:8=27;
х=27*8;
х=216;
Ответ: 216;
1) x+118-84= 203 наоборот будет 203+84 -118=169
(2,5*72+1,5x):4=84
180+1,5x=84*4
180+1,5x=336
1,5x=336-180
1,5x=156
x=156:1,5
x=104руб стоит кг печенья второго вида
<span>6</span>⁷<span>/</span>₁₅<span> - 2</span>³<span>/</span>₁₅<span> = 4</span>⁷⁻³<span>/</span>₁₅<span> = 4</span>⁴<span>/</span>₁₅
<span>
9</span>¹¹<span>/</span>₁₆ <span>+ 4</span>³<span>/</span>₁₆<span> - 2</span>²<span>/</span>₁₆<span> = 13</span>¹⁴<span>/</span>₁₆<span> - 2</span>²<span>/</span>₁₆<span> = 11</span>¹²<span>/</span>₁₆<span> = 11</span>³<span>/</span>₄
<span>
6</span>⁵<span>/</span>₁₄<span> - 2</span>¹¹<span>/</span>₁₄<span> = 5</span>¹⁹<span>/</span>₁₄<span> - 2</span>¹¹<span>/</span>₁₄<span> = 3</span>⁸<span>/</span>₁₄<span> = 3</span>⁴<span>/</span>₇
<span>
19</span>¹¹<span>/</span>₃₅<span> -12</span>²⁹<span>/</span>₃₅<span> = 18</span>⁴⁶<span>/</span>₃₅<span> - 12</span>²⁹<span>/</span>₃₅<span> = 6</span>⁴⁶⁻²⁹<span>/</span>₃₅ = 6¹⁷/₃₅
3,8а+7,7+1,7б+2,5а+11,2+4,6б=6,3а+6,3б+18,9=6,3*(а+б)+18,9
если а+б+3=10, значит а+б=10-3=7
6,3*7+18,9=44,1+18,9=63