Решите : 1) (-9,18:3,4-3,7)*2,1 + 2,04 =
2) (-3,9*2,8+26,6):(-3,2)-2,1 =|
и 2 уравнения :
3)4,37+6,7x=7,75+9,3x
4) 4*(3-x)-11=7*(2x-5)
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