Yes
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To check if (-7, -21) is a solution to the equation y = 2x - 7, we substitute the values of x and y into the equation:
- y = 2x - 7
- -21 = 2(-7) - 7
- -21 = -14 - 7
- -21 = -21
Since we got true equation, (-7, -21) is indeed a solution to the given equation.