4×(3-2к+5с)=12-8k+20c
-2(3а+с-20)=40-6a-2c
(а+с)+(х+у)-(р-к)=a+c+x+y-p+k
7(14-2х)-(56+8х)=98-14x-56-8x=42-22x
5х+11=2х-4
5x-2x=-11-4
3x=-15
x=-5
4×(3-2к+5с)=12-8k+20c
-2(3а+с-20)=40-6a-2c
(а+с)+(х+у)-(р-к)=a+c+x+y-p+k
7(14-2х)-(56+8х)=98-14x-56-8x=42-22x
5х+11=2х-4
5x-2x=-11-4
3x=-15
x=-5