Answer:
A) 5x-6y=3
B) 7y=2x+8
B) -2x + 7y = 8 then multiplying "B" by 2.5
B) -5x +17.5y = 20 then adding this to A
A) 5x -6y = 3
11.5y = 23
y = 2
x = 3
Step-by-step explanation:
Answer:

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Step-by-step explanation:

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, that is D
when multiplying like variables add the exponents
=
= 
0.25 is rational because it is a terminating (means 'its stops') fraction.
I am not in 8th grade but it might be the 2nd one