Which first step for solving the given system using substitution results in an equation without fractions? 2 x plus 6 y is equal to 7 6 x plus 18 y is equal to 24

Solve the second equation, 6x + 18y = 24, for x: divide each term by 6 to get x + 3y = 4, then x = 4 − 3y. This gives a substitution expression without fractions, so the correct choice is “Solve for x in the second equation.”

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