Question

-(6-9a)+(8a-5)=
9(2x-1)-4(x-2)=

Answer 1

расскроем скобки
-6+9а+8а-5=17а-11
18х-9-4х+8=14х-1

Answer 2

-(6-9a)+(8a-5)= -6+9a +8a-5 = -11+17a
9(2x-1)-4(x-2)= 18x-9-4x+8= 14x-1