Find the value of x.
a) x = 2
b) x = 3
c) x = 33
d) x = 52

B) x = 3

Step-by-step explanation:

The given triangle has three angles:

∠R, ∠S and ∠T

The exterior angle theorem says that

∠S+∠T = ∠R

Putting the values of angles

(57+x) + 25x = 45x

57 + x + 25x = 45x

57+26x = 45x

57 = 45x - 26x

57 = 19x

x = 57/19

x = 3

Hence, the correct answer is:

B) x = 3 ..

not only in mathematics, scientific proof also are required in the other field of science. also maths proofs are of particular structure, containing steps and logics. so proving is like doing science, it is science. that's why it is important to prove. 

an inaccurate proof leads to errors, or stating results that are not accurate.  which wil mess the probelm up you dont want this