Question

find the value of x for which angles (2x-5)° and (x-10)° are the complementary angles

Answer 1

When two angles are complementary then the sum of both are 90°.
So,2x-5+x-10 =90
=3x=90+15
=X=105/3
Hence ,x=35

Answer 2

→Sum of two angles which makes 90° are called complementary angles.

Therefore,

(2x-5)+(x-10)=90

2x+x-5-10= 90

3x-15= 90

3x= 105

x= 105/3

x= 35

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