1) 123 + x + 95 = 400;
x = 400 - 123 - 95;
x = 182;
2) 410 - 120 - a = 232;
-a = 232 - 410 + 120;
-a = -58;
a = 58.
1) 123 + x + 95 = 400;
x = 400 - 123 - 95;
x = 182;
2) 410 - 120 - a = 232;
-a = 232 - 410 + 120;
-a = -58;
a = 58.