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hodyreva [135]
3 years ago
11

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

Mathematics
1 answer:
lana [24]3 years ago
7 0

Answer:  (-3, 3)

<u>Step-by-step explanation:</u>

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       <em>subtracted 21 from both sides</em>

 x         = -3          <em>divided both sides by 4</em>


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