помогите упростить и решить примеры, пожалуйста, даю 20 баллов!!

1. 11x + x - 3x - 5x + 6x при x = 25,4;
2. -5b - 4(0,8 - b) + 2,3 при b = 0,3;
3. 1,3(x + 2/13) - 2,1 при x = 0,4;
4. 0,3(6p - 8x) - 0,1(3,4p - 1,2x) + 3 при p = -0,5 и x = -0,3​
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