20(x-2)=15x 20x-40=15x 20x-15x=40 5x=40 x=40:5 x=8 Ответ: 8. 13(x+6)=7(2-5x) 13x+78 14-35x 13x+35x=14-78 48x = -64 x=-64:48 64 48 X= 4 3 x= x=-1. 1 ответ;не знаю? кто поможет дам 50балоов только быстро​
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