Question 323075
Let desktop cost $x -------- 3.5%
Laptop costs x+1000 -------- 6.5%
..
0.065(x+1000)+0.035x = 490
0.065x +65+0.035x=490
0.1x=425
x=425/0.1
x=4250 desktop cost
..
y=5250 Laptop cost

CHECK
4250*0.035+5250*0.065=490