a number of two digits exceeds 4 times the sum of its digits by 3 and it is increased by 18 on reversing the digits find the number
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Answer:
first equation is 10x+y=4(x+y)+3;
second is 10x+y+18=10y+x;
by solving these equations we obtain x=3 and y=5,
so the number is 10*3+5=35
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