7x-4=31

解答

7 x - 4 = 31

x = 5

求解步骤

7 x - 4 = 31

将

4

到右边

7 x = 35

两边除以

7

x = 5

2 - \frac{3}{2} (4 g - 2) = - \frac{1}{5} (5 g + 10) - g

\frac{1}{3} (2 x - 5) = \frac{3}{4} (x - 2)

y = ∣ 0 ∣

so l v e f or x, 6 x - 2 y = 3

- 49 - x = - 8 x + 70