Homeschool Math Word Problem Equations TabletClass Math

[tobyharnish]

Let n be the first integer.
Then n+1 is the second integer (they're consecutive).
It says that their sum is 31.
So
n+n+1 = 31
2n+1 = 31
2n+1-1 = 31-1
2n = 30
2n/2 = 30/2
n = 15
Since n is the first integer, then `n+1 is the second. Using the substitution method, we plug 15 for n.
Therefore the second integer is 16.