If 4x − 3y = 13 and 5x + 2y = − 1, then x =
A. − 3
B. − 1
C. 1
D. 3
E. 5
OA C
Source: Magoosh
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If 4x − 3y = 13 and 5x + 2y = − 1, then x =
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BTGmoderatorDC
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GIVEN:BTGmoderatorDC wrote:If 4x − 3y = 13 and 5x + 2y = − 1, then x =
A. − 3
B. − 1
C. 1
D. 3
E. 5
4x − 3y = 13
5x + 2y = − 1
Take the TOP equation and multiply both sides by 2
Take the BOTTOM equation and multiply both sides by 3
We get:
8x - 6y = 26
15x + 6y = -3
ADD the two equations to get: 23x = 23
Solve: x = 23/23 = 1
Answer: C
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Scott@TargetTestPrep
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We can multiply the first equation by 2 and the second by 3, and we have:BTGmoderatorDC wrote:If 4x − 3y = 13 and 5x + 2y = − 1, then x =
A. − 3
B. − 1
C. 1
D. 3
E. 5
OA C
Source: Magoosh
8x - 6y = 26
and
15x + 6y = -3
Adding the equations together, we have:
23x = 23
x = 1
Answer: C
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