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soldier1979 [14.2K]
3 years ago
7

Which of these strategies would eliminate a variable in the system of equations?

Mathematics
2 answers:
Llana [10]3 years ago
7 0

Answer: A multiply the top equation by 6, multiply the bottom equation by -5, then add the equations

Step-by-step explanation:

8x + 5y = 7

-7x + 6y = -4

multiply the top equation by 6, the equation becomes;

48x + 30y = 42 ----------(3)

multiply the bottom equation by -5, the equation becomes;

30x - 30y = 20-------(4)

adding equation (3) and (4) together;

+30y - 30y = 0

Therefore the y variable will be eliminated from the equation

Novay_Z [31]3 years ago
4 0

Answer:

A.

Step-by-step explanation:

multiply the to equation by 6, multiply the bottom equation by -5 (you will get +30y and -30y to eliminate each other)then add equations (you will have +48x and +45x which will be = -42 + 20)

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