85=(73-x)+(67-x)+x+18

解答

85 = (73 - x) + (67 - x) + x + 18

x = 73

求解步骤

85 = (73 - x) + (67 - x) + x + 18

交换两边

(73 - x) + (67 - x) + x + 18 = 85

去除括号:

(a) = a

73 - x + 67 - x + x + 18 = 85

对同类项分组

- x - x + x + 73 + 67 + 18 = 85

x - (- 9) = - 16

2 + 60 + x = 83

\frac{1}{2} x - 7 = 5 - 3 (\frac{5}{6} x - 2)

7 x + 5 (x - 1) = - 5 + 12 x

13 - 3 d = - 8