(2y-5)/5+(3y+2)/3 = 5/6

解答

\frac{2 y - 5}{5} + \frac{3 y + 2}{3} = \frac{5}{6}

y = \frac{5}{6}

十进制

y = 0.83333 \dots

求解步骤

\frac{2 y - 5}{5} + \frac{3 y + 2}{3} = \frac{5}{6}

乘以最小公倍数

6 (2 y - 5) + 10 (3 y + 2) = 25

展开

6 (2 y - 5) + 10 (3 y + 2) : 42 y - 10

42 y - 10 = 25

将

10

到右边

42 y = 35

两边除以

42

y = \frac{5}{6}

so l v e f or y, 5 x - 7 y = 35

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