two numbers have a sum of 39. their difference is 11. what are the two numbers?
A+B=39
A-B=11
add the equations,
2A=50
solve for A. Then,put A into either of the original equations, and solve for B.
A-B=11
add the equations,
2A=50
solve for A. Then,put A into either of the original equations, and solve for B.