Answers

2016-01-08T20:14:59+08:00
Always remember that vertical angles are congruent. 

∡a = 2x + 30
∡b = 3x + 5

2x + 30 = 3x + 5
   30 - 5 = 3x - 2x
        25 = x

Therefore, the value of x is 25.

Substitute to check...
2(25) + 30 = 3(25) + 5
    50 + 30 = 75 + 5
            80 = 80
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