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If \(x - 3y = - 20,\) then \(2x - 6y =\)

Vincen: Legendary Member; Posts: 2898; Joined: Thu Sep 07, 2017 2:49 pm; Thanked: 6 times; Followed by:5 members

by Vincen » Tue Sep 08, 2020 7:36 am

00:00

If \(x - 3y = - 20,\) then \(2x - 6y =\)

(A) - 40
(B) - 10
(C) 0
(D) 10
(E) 40

Answer: A

Source: GMAT Paper Tests

Source: Beat The GMAT — Problem Solving | Tue Sep 08, 2020 7:36 am

Scott@TargetTestPrep: GMAT Instructor; Posts: 8086; Joined: Sat Apr 25, 2015 10:56 am; Location: Los Angeles, CA; Thanked: 43 times; Followed by:29 members

by Scott@TargetTestPrep » Fri Sep 11, 2020 1:13 pm

Vincen wrote: ↑
Tue Sep 08, 2020 7:36 am
If \(x - 3y = - 20,\) then \(2x - 6y =\)

(A) - 40
(B) - 10
(C) 0
(D) 10
(E) 40

Answer: A

Solution:

Multiplying the given equation by 2, we have:

2x - 6y = -40

Answer: A

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