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In this figure, angle 3 = (2x+15) and angle 6 = (3x+10)

What value of x makes a || b?

In this figure, angle 3 = (2x+15) and angle 6 = (3x+10) What value of x makes a || b-example-1
User Tangoal
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\angle3+\angle6=180^o\\\\\text{substitute}\\\\(2x+15)+(3x+10)=180\\\\2x+15+3x+10=180\\\\5x+25=180\ \ \ |-25\\\\5x=155\ \ \ |:5\\\\\boxed{x=31}


User Shoma
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