casandraserrat8853 casandraserrat8853

14-01-2019
Mathematics

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Eighth grade AA.8 Solve a system of equations using substitution clouds Solve using substitution. 4x + 7y = 9 y = 3 ( , ) Submit

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tramserran tramserran

14-01-2019

Answer: (-3, 3)

Step-by-step explanation:

4x + 7y = 9

y = 3

Replace "y" with "3" in the first equation to solve for x:

4x + 7(3) = 9

4x + 21 = 9

4x = -12 subtracted 21 from both sides

x = -3 divided both sides by 4

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