x + 45 = 5.27
x = 5.27 - 45
x = - 39.73
--------------------------
x - 39 : 3 = 471
x - 13 = 471
x = 471 + 13
x = 484
--------------------------
5x = 74 + 59
5x = 133
x = 133/5
-------------------------
x + 57 = 72
x = 72 - 57
x = 15
-----------------------------
x - 46 = 376
x = 376 + 46
x = 422
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