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User Wenbo
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1 Answer

4 votes

Answer:

b=4

Explanation:

since you have a straight line with 3 supplementary angles. One is given, one is 90⁰, and the other is an equation.

If we add 53 and 90:

53+90=143

we know that the line is a 180⁰.

So we will subtract 143 from 180.

180-143= 37

The equation states that (9 x b + 1) is equal to the angle which is 37. So we will equal 37 to the equation.

37= 9b+1

And now we solve for b.

We minus 1 on both sides.

37-1=9b

36= 9b

The we divide both side by 9

36/9 = 9b/9

4 = b

And that is how we find b.

User Wrahim
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