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3 years ago

-2+y=9 3x-7y=3 solve the system by the substitution

Mathematics

1 answer:

kherson [118]3 years ago

3 0

Hello from MrBillDoesMath!

Answer:

x = 80/3 ( 26 2/3)

y = 11

Discussion:

Step 1:

-2 + y = 9 => add 2 to both sides

2 + -2 + y = 9 +2 =>

y = 11

Step 2:

Substitute y = 11 (from Step 1) into

3x - 7y = 3 =>

3x - 7(11) = 3 => y = 11 from Step 1

3x - 77 = 3 => add 77 to both sides

3x - 77 + 77 = 3 + 77 =>

3x = 80 =>

x = 80/3

Thank you,

MrB

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