<span>1)2(8+3а)+7(а-1) при а=7 и 5</span>
<span>16 + 6а + 7а - 7 = 13а + 9</span>
<span>При а=7</span>
<span>13а + 9 = 13*7 +9 = 91 +9 = 100</span>
<span>При а = 5</span>
<span>13а + 9 = 13*5 + 9 = 65 + 9 = 74</span>
<span><span>2)9(2b+3)+5(2-b) при b=1и 3</span></span>
<span><span>18b + 27 + 10 - 5b = 13b + 37</span></span>
<span><span>При b=1</span></span>
13b + 37 = 13*1 + 37 = 13+37 = 50
При b = 3
13b + 37 = 13*3 + 37 = 39 + 37 = 76