Shortening 68624

The shirt price was reduced by 10% of the original price k. On the other hand, the price of the suit was increased by 5% of the original price p due to the shortening of the legs.
Depending on the variables k, and p, express the total cost of the two shirts and the tailored suit. Simplify the expression.

Correct answer:

c = 1.8 k + 1.05p

Step-by-step explanation:

$$\begin{gathered} a=100\%-10\%=1-\frac{10}{100}=0.9 \\ b=100\%+5\%=1+\frac{5}{100}=1.05 \\ {c}_0=2\cdot k+p \\ c=2\cdot a\cdot k+b\cdot p \\ c=2\cdot 0.9\cdot k+1.05\cdot p \\ c=1.8k+1.05p \end{gathered}$$

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