16х – 11х = 225;1,6х + 5,3х = 324,3;0,6 (х + 7) – 0,5(х – 3) = 6,8; – 3 (2,1х – 1) + 4,8 = – 6,7х + 9,4; Помогите пожалуйста
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X=45;
2)6,9x=324,3
X=47;
3)0,6x+4,2-0,5x+1,5=6,8
0,1x+5,7=6,8
0,1x=0,9
X=9;