Question

Solve the system
x-0.25y=11750
-0.20x + y=10000

Answer 1

x - 0.25y = 11,750 ⇒ x - 0.25y = 11,750
-0.2x + y = 10,000 ⇒ 0.05x - 0.25y = -2,500
0.95x = 14,250
0.95 0.95
x = 15,000
x - 0.25y = 11,750
15,000 - 0.25y = 11,750
- 15,000 - 15,000
-0.25y = -3250
-0.25 -0.25
y = 13,000
(x, y) = (15,000, 13,000)