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