Oblicz:
a) 9(2y-5x)-3(x-1)-5(-x-y)=
b) 6y-2x-(3x-4)+19=
c) (-15y+9x-6):(-3)-4+2*(-x-7y)=
d) -3(-2x-3y-5)+2(x-y)+4*(-5-2x)=
e) -(7x-8-4)-(5y+6x*7)=
f) -2(x-4)+4(y+5)-3(-x-3y)=
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a) 9(2y-5x)-3(x-1)-5(-x-y)= 18y - 45x - 3x +3 + 5x +5y = 23y - 48x + 3
b) 6y-2x-(3x-4)+19= 6y-2x-3x+4+19= 6y-5x+23