Answer :
1) x+23=2x+8
x-2x= 8-23
-x = -15
x=15
2)x+23=2x+8
x-2x=8-23
x= 15
WU= UW= x+23=15+23= 38
3)UV=UW+WV
UV= x+23 + 2x+8
UV=15+23+2*15+8
UV=38+38
UV=76
4) YA=YZ+ ZA
YA= x+12 +6x -13
YA=7x -1
x=15
YA=7*15-1
YA=105-1
YA=104
x-2x= 8-23
-x = -15
x=15
2)x+23=2x+8
x-2x=8-23
x= 15
WU= UW= x+23=15+23= 38
3)UV=UW+WV
UV= x+23 + 2x+8
UV=15+23+2*15+8
UV=38+38
UV=76
4) YA=YZ+ ZA
YA= x+12 +6x -13
YA=7x -1
x=15
YA=7*15-1
YA=105-1
YA=104