a)
[tex]7x - 13 + 3x = 14 + 5x + 3\\\\10x - 13 = 5x + 17\\\\10x-5x = 17+13\\\\5x = 30 \ \ /:5\\\\x = 6[/tex]
b)
[tex]7(2x-1)-(5x-3) = 4\\\\14x-7-5x+3 = 4\\\\9x - 4 = 4\\\\9x = 4+4\\\\9x = 8 \ \ /:9\\\\x = \frac{8}{9}[/tex]
c)
[tex]\frac{2x+1}{3}-\frac{3x-1}{4} = 2-x \ \ /\cdot12\\\\4(2x+1) - 3(3x-1) = 12(2-x)\\\\8x+4-9x+3 = 24-12x\\\\-x+7 = 24-12x\\\\-x + 12x = 24-7\\\\11x = 17 \ \ /:11\\\\x = \frac{17}{11}=1\frac{6}{11}[/tex]
