QUESTION IMAGE
Question
given ( m parallel n ), find the value of ( x ) and ( y ).
Step1: 利用平行线内错角相等
因为\(m\parallel n\),所以\(2x + 10\)和\(8x - 20\)是内错角,内错角相等,即\(2x + 10 = 8x - 20\)。
Step2: 解方程求\(x\)
对\(2x + 10 = 8x - 20\)进行移项,\(10 + 20 = 8x - 2x\),即\(30 = 6x\),解得\(x = \frac{30}{6} = 5\)。
Step3: 求\(y\)的值
因为\(y\)和\(8x - 20\)是邻补角,所以\(y + (8x - 20) = 180\)。将\(x = 5\)代入\(8x - 20\),得\(8\times5 - 20 = 40 - 20 = 20\)。则\(y + 20 = 180\),解得\(y = 180 - 20 = 160\)。
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\(x = 5\),\(y = 160\)