medium · GRE Quant
In Figure 9, two lines intersect. One angle is labeled (3x+7)^circ and its vertical angle is labeled (5x-29)^circ. The diagram is not drawn to scale. What is the measure of either of these vertical angles?
- 18^circ
- 119^circ
- 31^circ
- 61^circ
- 79^circ
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