17a + 21a + 45 = 38a+ 45
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12/45 = 4/15
-45 plus 512 plus 45 plus 56 = 568
e+4-9=45 (write down the equation) e-5=45 (simplify 4-9) e=50 (add 5 to both sides) Answer: e=50.
12:45 and if you simplify it , it becomes 4:15
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