Question 37324
If Chad earns $X/yr, Maria earns X+2500

Both their incomes total $39,500

Chad + Maria = $39,500
so,
X + (X+2500) = 39,500

Solve for this, you get

2X = 37,000

x = 18,500

So, Chad earns $18,500 and Maria 18500 + 2500 = $21,000