Although all of the following systems can be solved via the substitution method, the substitution would be the best method for solving which system?

y = 3x + 1

y = 3x - 5

y = 2x + 3

2x + y = 5

0.5t - w = 2.5

2t + 3w = 4

3x + 2y = 18

4x + 5y = 60

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