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Mathematics 4 Online
OpenStudy (yisselluna):

Based on the lesson, which of the following would be the best approach for solving this system by substitution? 5x = y + 6 2x - 3y = 4 Solve the first equation for x. Solve the first equation for y. Solve the second equation for x. Solve the second equation for y.

OpenStudy (mww):

usually you substitute what is easiest to make the subject since 5x = y - 6 is one step away from having y as the subject, this is the easiest one. so you will get y = 5x + 6 and sub this into the second eqn. When you do so, the y disappears (as it gets subbed for something involving x) so you end up with the second equation turning into an equation to solve for x only.

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