QUESTION IMAGE
Question
given ( m parallel n ), find the value of ( x ) and ( y ). the diagram shows parallel lines ( m ) and ( n ) cut by a transversal, with angles ( (y + 16)^circ ), ( (3x - 15)^circ ), and ( (2x + 7)^circ ) at the intersection on line ( n ).
Step1: 找x的方程(对顶角)
观察图中\((2x + 7)^\circ\)和\((3x - 15)^\circ\),它们是对顶角,对顶角相等,所以列方程:
\(2x + 7 = 3x - 15\)
Step2: 解x的方程
移项可得:
\(3x - 2x = 7 + 15\)
\(x = 22\)
Step3: 找y的方程(同位角)
因为\(m\parallel n\),\((y + 16)^\circ\)和\((2x + 7)^\circ\)是同位角,同位角相等。先代入\(x = 22\)到\(2x + 7\)中:
\(2\times22 + 7 = 44 + 7 = 51\)
所以\(y + 16 = 51\)
Step4: 解y的方程
移项可得:
\(y = 51 - 16\)
\(y = 35\)
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\(x = 22\),\(y = 35\)