Самостоятельная работа, алгебра.

1. a) 30a^3 + 35ba^2 - 40ab^2 + 5b^3
b) 30a^5 + 35ba^4 - 40a^3b^2 + 5a^2b^3
c) 30a^6 + 35a^5b - 40a^4b^2 + 5a^3b^3
d) 30a^4b^18 + 35a^3b^19 - 40a^2b^20 + 5ab^21
e) 3a^3x + 3,5a^2xb - 4ab^2x + 0,5xb^3
2. a) 6x + 10y - 6x - 12y = -2y
b) 8a^3 - 8a^2b + 48ab^2 - 5a^2b - 30ab^2 + 15b^3 + 2a^2b - 12ab^2 = 8a^3 - 11a^2b + 6ab^2 + 15b^3
3. m = -5; n = 1
4. a) 8x - 40 - 4x + 8 = 12; 4x = 44; x = 11
b) 2x + 3 - 10x + 2 = 7x - 1 - 6x - 22; 9x = 28; x = 28/9
c) 2x + 1 + 3x - 6 = 15; 5x = 20; x = 4
d) 5x - 4x + 12 = -20; x = -32
5. a) 9x - 9 + 10x - 15 = 90; 19x = 114; x = 6
b) 9x - 9 + 10x - 15 = 90; x = 6
c) 4x + 14 - 3x + 9 = 24x; 23x = 23; x = 1
d) 15x - 3 -4x + 8 = 120 - 12x; 23x = 115; x = 5