<span><span>15+48=63
</span><span> 18-12=6
</span><span> 49-26+67=90
</span><span> 45-34+7=18
</span><span> 9+9=18</span></span>
4/9х+1/3х=6 3/10
4/9х+3/9х=6 3/10
7/9х=63/10|×7/9
х=1.4
2. 2/14х+3/14х=1 2/5
5/14х=7/5|×5/14
х=0.5
4_ 4/5:4/17:3_2/5=24/5:4/17:17/5= 24/5*17/4*5/17=24/4=6
(6_1/5- 4_1/3):1_1/3=(31/5-13/3):4/3=(93/15-65/15):4/3=28/15:4/3=28/15*3/4=7/5=1_2/5
Ответ:
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