求解 y=(2/7)x+15 | Microsoft Math Solver

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求解 x 的值

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求解 y 的值

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\frac{2}{7}x+15=y

移项以使所有变量项位于左边。

\frac{2}{7}x=y-15

将方程式两边同时减去 15。

\frac{\frac{2}{7}x}{\frac{2}{7}}=\frac{y-15}{\frac{2}{7}}

等式两边同时除以 \frac{2}{7}，这等同于等式两边同时乘以该分数的倒数。

x=\frac{y-15}{\frac{2}{7}}

除以 \frac{2}{7} 是乘以 \frac{2}{7} 的逆运算。

x=\frac{7y-105}{2}

y-15 除以 \frac{2}{7} 的计算方法是用 y-15 乘以 \frac{2}{7} 的倒数。

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二次方程式