Atriangle has the following side lengths: x - 2, x, and 3x + 1. another triangle has the following side lengths: 2x - 5, x + 4, 6x - 7. if the perimeters of the two triangles are equal, what is x?

The perimeter is the sum of the lengths of the sides. The given information means ...

... (x-2) + x + (3x+1) = (2x-5) + (x+4) + (6x-7)

... 5x -1 = 9x -8 . . . . . simplify

... 0 = 4x -7 . . . . . . . . subtract the left side

... 0 = x -7/4 . . . . . . . .divide by the coefficient of x

... x = 7/4

drop him sis he’s not worth your precious time

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