1)Решить уравнение
1)7-x=19
2)39-2x=17
3)(x+2)+3=43
4)5x+2/3=1
5)0,5+(x+1)=3

2)Упростить
1)-3,5x+4,2x=
2)-5,7x-1,5x=
3)0,5x+2(0,3x-1)=
4)2,3x-3,2(1-5x)=
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