Razwiąsz obliczenia 1/2 (4a+1) -2/3(6y-9) -(4x+3-1/2y) -(-1/2+-z-6) to 1/2 itp to ułamki

2a+1/2 -4+6=2 -4x-3+1/2y 1/2+z+6

1/2(4a+1)= 2a + 1/2 -2/3(6y-9)= -4y +3 -(4x+3-1/2y) = -4x-3+ 1/2y -(-1/2-z-6) =1/2 +z+6=z+6½