Question

A first number plus a second number is 10. Twice the first number plus the second totals 26.

Answer 1

1st number = x
2nd number = y

2x + y = 26
                    -
  x + y = 10

x = 16

26 - (2 x 16) = -6

10 - 16 = -6


Number 1 is 16
Number 2 is -6