789 - x = 27 ÷ 3789 - x = 9-x = 9 - 789-x = -780x = 780
u × 2 = 91 - 83u × 2 = 8u = 8 ÷ 2u = 4
a - 36 = 9 × 2a - 36 = 18a = 18 + 36a = 54
789 - x = 27 ÷ 3
789 - x = 9
-x = 9 - 789
-x = -780
x = 780
u × 2 = 91 - 83
u × 2 = 8
u = 8 ÷ 2
u = 4
a - 36 = 9 × 2
a - 36 = 18
a = 18 + 36
a = 54