finding two integers in a few consecutive times, knowing that 2 times a small 3-fold number equals-87.
2 câu trả lời
Call the small number x.
call the big number x + 1 (because 2 consecutive integers are 1 unit apart)
We have PT: 2x + 3 (x + 1) = - 87
<=> 2x + 3x + 3 = - 87
<=> 5x + 3 = - 87
<=> 5x = -90
<=> x = -18
So the baby is equal to -18, the big number is -17
2x + 3 (x + 1) = - 87
<=> 2x + 3x + 3 = - 87
<=> 5x + 3 = - 87
<=> 5x = -90
<=> x = -18