Determine the value of x that would make the diagram true

The value of a triangle is 180 degrees, so the values of x have to all equal up to 180. So ignore where it says times 1, then break 180 into 3 parts. 180 divided by 3 =60, the three sides to the triangle is 3 60's divide two of them by 2 and you get 20.                                                                                                                                                                                                                                                                                                                        (2x -1 = 19) and (2x +1=21) and the last x=60

the law of definite proportions states samples of a compound will always contain the same proportion of elements by mass. in other words, a given compound will always contain the same elements in the same proportions by mass.the law of multiple proportions states when two elements combine with each other to form more than one compound, then the weights of one element that combine with a fixed weight of the other are in a ratio of small whole numbers.