Question

Упростите выражение
а) 7x-3(5x+4)=
б) -(x+5)+(28-9x)=

Answer 1

7х-15х-12=-8х-12

-х-5+28-9х=-10х+23

Answer 2

7x-3*(5x+4)=7x-15x-12=-8x-12

Answer 3

7x-3(5x+4)=7x-15x-12=-8x-12;

-(x+5)+(28-9x)=-x-5+28-9x=-10x+23.