36,5*100:2,5=1460 кг чайного листа
<span>49-3х=4 </span>
<span>-3х=4-49 </span>
<span>-3х=-15 </span>
<span>х=15</span>
<span>легко</span>
101² = (100+1)² = 100² + 2*1*100 + 1² = 10 000 + 200 + 1 = 10 201
48² = (50-2)² = 50² - 2 * 50 * 2 + (-2)² = 2 500 - 200 + 4 = 2 304
144q² - (3 - 12q)² = 144q² - 9 + 72q - 144q² = 72q - 9
48y + (3y - 8)² = 48y + 9y² - 48y + 64 = 9y² + 64