Jack

10-10-2013, 12:28 PM

In the figure below what is the value of x given that 2x-y=110

44

Figure not drawn to scale

(A) 50

(B) 60

(C) 70

(D) 80

Thanks

44

Figure not drawn to scale

(A) 50

(B) 60

(C) 70

(D) 80

Thanks

View Full Version : geometry triangle's angles

Jack

10-10-2013, 12:28 PM

In the figure below what is the value of x given that 2x-y=110

44

Figure not drawn to scale

(A) 50

(B) 60

(C) 70

(D) 80

Thanks

44

Figure not drawn to scale

(A) 50

(B) 60

(C) 70

(D) 80

Thanks

miranda

10-10-2013, 12:32 PM

The sum of angles in a triangle is always 180^o

So, x+y+50=180 \Rightarrow x+y=130 (1)

2x-y=110 (2)

Solving the simultaneous equations (1), (2)

x+y=130 \Rightarrow x+2x-110=130 \Rightarrow 3x=240 \Rightarrow x=80^o

Therefore the correct answer is (D).

So, x+y+50=180 \Rightarrow x+y=130 (1)

2x-y=110 (2)

Solving the simultaneous equations (1), (2)

x+y=130 \Rightarrow x+2x-110=130 \Rightarrow 3x=240 \Rightarrow x=80^o

Therefore the correct answer is (D).

Jack

10-10-2013, 12:33 PM

thanks for your response!

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