А)х\24=3\28.28х = 72х = 72/28 = 18/7б)х:13=24:39. х/13 = 8/13х = 8
<span> × + 7 = 45; х=45-7; х=38
</span><span> × - 7 = 38; х=38+7; х=45
</span><span>45 - × = 7; -х=7-45; х=38</span>
24/5 * ( х + 0.7 ) - 3.16 = 8.84
4.8 * ( х + 0.7 ) - 3.16 = 8.84
4.8х + 3.36 - 3.16 = 8.84
4.8х + 0.2 = 8.84
4.8х = 8.84 - 0.2
4.8х = 8.64
х = 1.8
1)160:15,3=10,48
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