A two digit nbr is three more than 4 times the sum of its digit .if 18 is added to the nbr the digit are interchanged
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10x+y=4(x+y)
10x+y=4x+4y
6x=3y
2x=y
10x+y+18=10y+x
9x-9y=-18
x-y=-2
x-2x=-2
x=2
y=4
The number is 24
10x+y=4x+4y
6x=3y
2x=y
10x+y+18=10y+x
9x-9y=-18
x-y=-2
x-2x=-2
x=2
y=4
The number is 24
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