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Mathematics

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How do I use substitution to solve a system of linear equations?

Answer :

Ruilin0715 Ruilin0715

Today at 8:03 AM

Answer:

for example:

y=2x+4

3x+y=9

We can substitute y in the second equation with the first equation since y = 2x+4.

3x+(2x+4)=9

5x+4=9

5x=5

x=1

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