Which value of x satisfies both -9x + 4y = 8 and -3x − y = 4?
Which value of x satisfies both -9x + 4y = 8 and -3x − y = 4?
one of the options below as your answer:
A.-1/7
B.-7/9
C.-8/7
D.-9
E.-4/3
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Which value of x satisfies both -9x + 4y = 8 and -3x − y = 4?
one of the options below as your answer:
A.-1/7
B.-7/9
C.-8/7
D.-9
E.-4/3
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Answers & Comments
Verified answer
C is the right answer.
Rearranging your equations, you get y=(8+ 9x)/4 and y= -3x -4
Therefore, -3x -4=(8+ 9x)/4
And just simplify that to get x= -24/21 which is -8/7
This link has a step by step solution to your problem:
http://www.symbolab.com/math/solver/step-by-step/a...
Hope this helps