What is the value of 7q-p
(1) p+3q = 3
(2) 2p-4q = -5
I got this wrong on my practice test, however Kaplan's explanation of why the answer is C is not very explanatory. I chose E, seeing as how everything is a linear equation with TWO unknowns.
HELP!!
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Kaplan practice test question
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cooperbaker
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cooperbaker
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cramya
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It is possible to solve for p and q with 2 equations (2 unknowns 2 equations).
Or u can subtract 2 from 1 and it gives u 7q-p value directly.
p+3q - ( 2p-4q ) = 3 - (-5)
p+3q-2p+4q = 8
7q-p = 8
C)
Or u can subtract 2 from 1 and it gives u 7q-p value directly.
p+3q - ( 2p-4q ) = 3 - (-5)
p+3q-2p+4q = 8
7q-p = 8
C)
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vittalgmat
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This is fairly easy..
Each stmt by itself is insufficient
While combining, one needs to verify whether the eqns are UNIQUE (ie. one eqn cannot be derived from the other). Once this is verified, we dont have to solve: 2 unique eqns, 2 variables.. Done.
Ans C
Each stmt by itself is insufficient
While combining, one needs to verify whether the eqns are UNIQUE (ie. one eqn cannot be derived from the other). Once this is verified, we dont have to solve: 2 unique eqns, 2 variables.. Done.
Ans C
