[GMAT math practice question]
x + 2y + 3z = 4 and 5x + 4y + 3z = 8. What is the value of x + y + z?
A. 1
B. 2
C. 3
D. 4
E. 5
x + 2y + 3z = 4 and 5x + 4y + 3z = 8. What is the value of x
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- Max@Math Revolution
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GIVEN:Max@Math Revolution wrote:[GMAT math practice question]
x + 2y + 3z = 4 and 5x + 4y + 3z = 8. What is the value of x + y + z?
A. 1
B. 2
C. 3
D. 4
E. 5
x + 2y + 3z = 4
5x + 4y + 3z = 8
ADD the two equations to get: 6x + 6y + 6z = 12
Factor: 6(x + y + z) = 12
Divide both sides by 6 to get: x + y + z = 2
Answer: B
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Brent
- Max@Math Revolution
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=>
When we add the two equations, we obtain (x+2y+3z) + (5x+4y+3z) = 6(x+y+z) = 4 + 8 = 12. Dividing both sides of this equation by 6 yields x+y+z = 2.
Therefore, the answer is B.
Answer: B
When we add the two equations, we obtain (x+2y+3z) + (5x+4y+3z) = 6(x+y+z) = 4 + 8 = 12. Dividing both sides of this equation by 6 yields x+y+z = 2.
Therefore, the answer is B.
Answer: B
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Max@Math Revolution wrote:[GMAT math practice question]
x + 2y + 3z = 4 and 5x + 4y + 3z = 8. What is the value of x + y + z?
A. 1
B. 2
C. 3
D. 4
E. 5
Adding the equations, we have:
6x + 6y + 6z = 12
Dividing by 6, we have:
x + y + z = 2
Answer: B
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