Question

Q10. Find the value of x, if two
supplementary angles are: (3x+15)º
and (2x-10)°
O a) x= 40
O b)x=35
O c)x=30
O d) x=25​

Answer 1

Answer:

x=35

Step-by-step explanation:

3x+15+2x-10=180(supplementary angles is 180degree)

or, 5x=180-5

or, 5x=175

or, x=175/5

So, x=35

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Answer 2

Answer:

the sum of two supplementary angles is equal to the 180°.

so,

3x+15+2x-10=180

5x+5=180

5x=175

x=175/5

x=35

then submit x value in the angles

3x+15=3(35)+15=120°

2x+15=2(35)-10=60°