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­Affordable: 
- before: \(100B_1 + 50H_1 = 5*100 + 10*50 = 1000\)
- after: \(100B_2 + 50H_2 = 1000 * 1.035 = 1035\)

 Careful
- before: \(200B_1 + 200H_1 = 5*200 + 10*200 = 3000\)
- after: \(200B_2 + 200H_2 = 3000 * 1.03 = 3090\)

\(100B_2 + 50H_2 = 1035\)
\(200B_2 + 100H_2 = 2070\) (2)

\(200B_2 + 200H_2 = 3090\) (1)

(1) - (2)
=> \(100H_2 = 3090 - 2070 = 1020\)

=> \(H_2 = 10.2­\)

=> \(\frac{H_2}{H_1} = \frac{10.2}{10} = 102­\)%­



\(200B_2 = 2070 - 1020 = 1050\)

=> \(B_2 = 5.25\)

=> \(\frac{B_2}{B_1} = \frac{5.25}{5} = 105\)%­

H: 2%
B: 5%­
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Affordable Auto Parts cost ==> 5*100 + 10*50 = 500 + 500 = 1000
Now , Affordable Auto Parts cost = 1035

Lets say , belts increase by x% and hoses increase by y%,
35 = 500 * x/ 100 + 500*y/100

SImilarly ,
1000 + 2000 = 3000
90 = 1000*x/100 + 2000*y/100
Solving ,
5x +5y = 35
x + y= 7
and x + 2y = 9
y= 2
x= 5

Belts = 5%
hoses = 2%­
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