Question

Solve for r please. And also explain how you did it if you can

Answer 1

r = 27

Step-by-step explanation:

The angles shown in the image are complementary, which means their sum is equal to 90°.

We can write the following equation to find the value of r based on the above-mentioned information :

2r + 4 + 5 = 90

• Add like terms.

3r + 9 = 90

• Subtract 7 from both sides.

3r = 81

• Divide both sides by 3.

r = 27