Ilona M. answered • 6d

Knowledgable and experienced in homeschooling

x laptop , y desktop first: 7% x + 5% y = 250

x = y - 200

substitute for x

0.07 (y - 200) + 0.05y = 250

0.07y - 14 + 0.05y = 250

0.12y = 250 + 14

0.12y = 264

y = 264/0.12

y = 2200

x = 1000