Знайдіть корінь рівняння: 1) 4(x-6)=x-9; 4) 3,5-x=8(x+2,8); 2) 6-3(x+1)=7-2x; 5) 0,3 (6-2y)=4,5-0,7 (y+9); 3) (8x+3)-(10x+6)=9;
ДАЮ 80 БАЛОВ СРОЧНО​
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