zach6024
25.06.2019 •
Mathematics
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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Ответ:
(-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
Ответ:
HOPE THIS HELPS! ^_^