0.75x+0.8(x+10)=101

解答

0.75 x + 0.8 (x + 10) = 101

x = 60

求解步骤

0.75 x + 0.8 (x + 10) = 101

在两边乘以

100

75 x + 80 (x + 10) = 10100

乘开

80 (x + 10) : 80 x + 800

75 x + 80 x + 800 = 10100

\frac{x - 5}{4} - \frac{10 x - 3}{20} = \frac{2 x + 1}{5}

3 (5 x + 10) + 10 = 6 x - (x + 10)

so l v e f or y, x^{3} - x^{2} y = 49

\frac{x}{5} - \frac{x}{2} = 15

3 (n + i) + 5 (n + 3 i) = m (1 + 2 i)