Problem 2 of 7
Solve the system by substitution: x = y + 4, x + 2y = 13.
Hints
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substitute expression, solve, and back-substitute.
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One equation must already isolate x or y; solution should be exact.
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Solution
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1. Substitute the isolated expression into the other equation.
2. Solve for one variable.
3. Back-substitute to find the other variable.
Use the worked steps, then substitute the final answer back into the original relationship to confirm it satisfies the prompt.
Values not checked in both equations.