How do you solve the equation using substitution? 2x-9y=14 6x-y=42

How do I solve equations using substitution and elimination?
in Algebra 1 Answers by Level 1 User (140 points)

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3 Answers

1) 2x - 9y = 14

2) 6x - y = 42  or  6x - 42 = y

substitute eq(2) into eq(1):

2x - 9(6x - 42) = 14

2x - 54x + 378 = 14

-52x = -364

x = -364/-52 = 7

using eq(2):

y = 6(7) - 42 = 0

check using eq(1):

2(7) - 9(0) = 14

14 = 14

x = 7, y = 0
by Level 6 User (23.1k points)
2x+9y=12;solve for y
by
2x-9y=14
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