Решите уравнение:
1.а)-(3y+7)=18-2(8+y)
б)-2(2-5x)= -5+2(x-3)
в)4x-2(x+7)=2(3-x)
2.а)1,24x+3,46=1,76x+6,58
б)-4,92y-(0,08y+5,12)= -0,88-y
3.На сколько процентов 5 больше 4?
4.На сколько процентов 4 меньше 5?
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