1) 8.4х=3.5×4
8.4х=14
х=14÷8.4=1.67
2) 2.5х=0.8×1.5
2.5х=1.2
х=1.2÷2.5=0.48
3) 2у=6х
4) х^2=36
х=6
<em><span>3</span><span> 4</span><span>\13</span><span>×15</span><span> 3</span><span>\41</span><span>-3</span><span> 4</span><span>\13</span></em><em><span><em>×</em>2</span></em><em><span> 3</span></em><em><span>\41</span></em>=43/13*618/41-43/13*85/41=43/13(618/41-85/41)=43/13*533/41=43*41/41=43
2/13 3/13 5/13 7/13 9/13 4/4
Я думаю в 4 ответ б
а в пятом в