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Solve the system using the substitution method.
y=4
x+y=7
Demonstrate how you substituted to write an equation in one variable.

Solve the system using the substitution method y4 xy7 Demonstrate how you substituted to write an equation in one variable class=

Respuesta :

Answer:

x=3

Step-by-step explanation:

x+4=7

x=7-4

x=3

bobrowder7

since y=4, we can substitute that value into the second equation. now x+y=7 becomes x+4=7. when we subtract three from both sides, we get that x=3. the ordered pair is (3,4)

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