Answer
Infinite solutions
Work Step by Step
We have $$1)y = \frac{1}{7}x+3$$ $$2)x-7y =-21$$
Substituting (1) in (2) $$x - 7(\frac{1}{7}x+3) = -21$$ $$x - x -21 = -21$$ $$0=0$$
Infinite solutions
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