Составим уравнение:
76-х=48
х= 76-48
х= 28
ответ: израсходовали 28 литров
<span>1</span><span>) 32</span><span>- 12</span><span>20 (</span><span>грн) -</span><span>різниця</span><span>2</span><span>)</span><span>60:</span><span>20</span><span>=</span><span>3</span><span>(грн</span><span>) -</span><span>вартує одна</span><span>ручка.</span><span>3</span><span>) 32</span><span>*</span><span>3</span><span>= 96</span><span>(грн</span><span>) -</span><span>заплатили</span><span>за</span><span>прості</span><span>ручки.</span><span>4</span><span>) 12</span><span>*</span><span>3</span><span>= 26</span><span>(грн</span><span>) -</span><span>заплатили</span><span>за</span><span>гелівие</span><span>ручки</span>
(9-1+7):5+3=6
1) 9-1+7=15
2) 15:5=3
3) 3+3=6
Получилось так у меня:)
98:49x50-78
98:49=2
2* 50=100
100-78=22
В) -4/9•(-2)=8/9
а)3/4•(-3/5)= -9/20