# math

how do i solve this using substitution?

5x+y=15
4x+4y=12

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2. 👎 0
3. 👁 133
1. y = 15-5x

replace y into the other eq

4x+4(15-5x) = 12

4x + 60 - 20x = 12
-16x = -48

x = 3

plug 3 onto the fisrt or second eq to get Y..

y = 15-5x
y = 15-5(3)

y = 0

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2. 👎 0

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