(4x-5)+(7x-5)+(x-6)+(8x-4)=360

解答

(4 x - 5) + (7 x - 5) + (x - 6) + (8 x - 4) = 360

x = 19

求解步骤

(4 x - 5) + (7 x - 5) + (x - 6) + (8 x - 4) = 360

去除括号:

(a) = a

4 x - 5 + 7 x - 5 + x - 6 + 8 x - 4 = 360

对同类项分组

4 x + 7 x + x + 8 x - 5 - 5 - 6 - 4 = 360

so l v e f or x, 3 x + 4 y = 2 x

5 (2 x + 3) - 4 x = - 4 + 3 (x - 4)

(3 + \frac{1}{2} i) (4 - \frac{5}{3} i) = \frac{77}{6} - 3 i

3 x - 5 = 5 x + 11

5 x + 4 = 2 x + 16