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Given that r = 7x+7y find x when y = 2 and r = 8

Given that r = 7x+7y find x when y = 2 and r = 8
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4 votes
Given that r = 7x+7y find x when y = 2 and r = 8

asked
User Joe Keene
by
8.5k points

1 Answer

6 votes

Answer:

x = -6/7

Explanation:

We must substitute in the values and solve for x


r = 7x + 7y\\(8) = 7x + 7(2)\\8 = 7x + 14\\8 - 14 = 7x + 14 - 14\\-6 = 7x\\-6/7 = 7x/7\\x = -6/7

answered
User Be Kind
by
8.5k points
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