3 years ago

Solve for the value of r help pls

Mathematics

1 answer:

Vera_Pavlovna [14]3 years ago

3 0

Answer:

r=20

Step-by-step explanation:

since the angle and sum of a straight line is equal to 180, you structure an equation:

180=105+(4r-5)

solve for r

180=100+4r

80=4r

20=r

check answer

4r-5 4(20)-5

80-5

75+105=180

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