X-0.3X-(0.7X)x0.8=168
X-0.3X-0.56X=168
0.14X=168
X=168/0.14
X=1200
X-0.7X+110=X+X/4
X-0.7X-X-0.25X=-110
-0.95X=-110
X=110/0.95
X=2200/19
X-0.3X-(0.7X)x0.8=168
X-0.3X-0.56X=168
0.14X=168
X=168/0.14
X=1200
X-0.7X+110=X+X/4
X-0.7X-X-0.25X=-110
-0.95X=-110
X=110/0.95
X=2200/19