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OpenStudy (anonymous):
Use substitution to solve the system: `15x = 5y + 5` `y = 2x + 1` A. (5, 3) B. (5, -2) C. (2, 3) D. (2, 5)
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OpenStudy (tkhunny):
You should substitute something. The second equation is quite conveniently already solve for y. Substitute that expression into the other equation.
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