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38 votes
38 votes
Solve using substitution.
y = –7x − 8
y = 2x + 10

User Nathan Baulch
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1 Answer

21 votes
21 votes
Because they are both equal to y, you start off by making them equal to each other which would be…. 2x + 10 = -7x - 8 You then subtract 10 from both sides making 2x= -7x-18 next, add 7x to both sides making 9x=-18 divide both sides by 9 to get (x = -2). Then, plug x in to one of the equations to solve y. So, y = -7(-2)-8 or 14-8. Final answer: x = -2 y = 6 Or (-2, 6)
User Chotchki
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