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5x + 4y +3z = 14 x = 3z -22 z = 6 What is the y-value of the solution?
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5x + 4y +3z = 14 x = 3z -22 z = 6 What is the y-value of the solution?

User Niklas Berglund
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1 Answer

4 votes
x = 3z - 22
z = 6
5x + 4y + 3z = 14
5 (3z - 22) + 4y + 3 (6) = 14
15z - 110 + 4y + 18 = 14
15 . 6 - 110 + 4y + 18 = 14
90 - 110 + 4y + 18 = 14
90 - 110 + 18 - 14 + 4y = 0
-16 + 4y = 0
4y = 16
y = 4
User Naomi
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7.5k points
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