What is the best way to change this sentence from passive voice to active voice? After looking through the catalog, I was asked by my mother to buy a bottle of Cartier perfume for Mother's Day.

After looking through the catalog, my mother asked me to buy a bottle of Cartier perfume for Mother's Day.

Explanation:

After I looked through the catalog, my mother asked me to buy a bottle of Cartier perfume for Mother's Day.

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substitute y = 2x - 4 to x + 2y = 12:

x + 2(2x - 4) = 12     use distributive property

x + (2)(2x) + () = 12

x + 4x - 8 = 12     add 8 to both sides

5x = 20     divide both sides by 5

x = 4

put the value of x to the first equation:

y = 2(4) - 4

y = 8 - 4

y = 4

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