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choose correct alternative
If 49x – 57y = 172 and 57x – 49y = 252 then x – y = ……… ?

(A) 80 (B) 4 (C) 10 (D) 8​

By Amelia

choose correct alternative
If 49x – 57y = 172 and 57x – 49y = 252 then x – y = ……… ?

(A) 80 (B) 4 (C) 10 (D) 8​

About the author
Amelia

Sanyo bought shoes for $35.65 and x pairs of socks for $1.85 each. Which expression shows the total money spent?
35.65x + 1

Atul has a gift place in a cuboidal box of dimension I, b and h. He want to cover the box nicely to
present it to his friend

1 thought on “choose correct alternative<br />If 49x – 57y = 172 and 57x – 49y = 252 then x – y = ……… ? <br /><br />(A) 80 (B) 4 (C) 10 (D) 8​”

  1. Answer:

    (C) 10

    Step-by-step explanation:

    57x – 49y = 252. Eqn 1

    49x – 57y = 172 Eqn2

    On subtracting Eqn 1 and 2 qe get

    8x + 8y = 80 [divide by 8 on bothsides]

    x + y =10

    Reply

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