Based on the calculations, the value of x will be equal to 20°
First and foremost, we should note that the total angles in a complementary angles equal to 90°.
In this case, we have to add the two angles that we are give and then equate them to 90°. This will be:
(x + 5°) + (4x - 15°) = 90°
x + 5° + 4x - 15° = 90°
Collect like terms
x + 4x = 90° - 5° + 15°
5x = 100°
x = 100°/5
x = 20°
Therefore, based on the calculations, the value of x is 20°
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