(х+155)-35=145х + 155 - 35 = 145х + 120 = 145х = 145 - 120х = 25
168-(98+х)=65168 - 98 - х = 6570 - х = 65-х = 65 - 70-х = -5х = 5
(853+х)-53=900853 + х - 53 = 900х + 800 = 900х = 900 - 800х = 100
(х+275)-275=384х + 275 - 275 = 384х = 384
Note: It seems there might be a mistake in the last equation as it simplifies to x=384.
(х+155)-35=145
х + 155 - 35 = 145
х + 120 = 145
х = 145 - 120
х = 25
168-(98+х)=65
168 - 98 - х = 65
70 - х = 65
-х = 65 - 70
-х = -5
х = 5
(853+х)-53=900
853 + х - 53 = 900
х + 800 = 900
х = 900 - 800
х = 100
(х+275)-275=384
х + 275 - 275 = 384
х = 384
Note: It seems there might be a mistake in the last equation as it simplifies to x=384.