Which system of equations is equivalent to the following system?

4x + y = 4

2x + 7y = 28

(A) 4x + y = 4

-2x - 7y = 28

(B) 4x + y = 4

-8x - 28y = 112

(C) - 28x - 7y = - 28

2x + 7y = 28

(D) - 8x - 2y = 8

2x + 7y = 28

What is 3t+4=12+3t because this is hard

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720:90=72tens:9tens=

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