-3r+1=7

解答

- 3 r + 1 = 7

r = - 2

求解步骤

- 3 r + 1 = 7

将

1

到右边

- 3 r = 6

两边除以

- 3

r = - 2

so l v e f or x, - 2 x + 5 y = 3

so l v e f or b, f = b^{2} x c

so l v e f or x, x + 2 y - \frac{1}{3} (3 x - 2) = - \frac{4}{3}

8 + 12 x = 15 x - 19

so l v e f or p, p + q = 7