What is the measure of angle x?

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m∠x=

All you have to do to find this answer is add 102 and 31. which you would than get 133. After that you would take 180 and subtract 133. Than you would get 47.

47 is your answer!!
Hope i helped ^-^

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.