Please look at the picture. I answered b but it was incorrect. Please help.

Mathematics

1 answer:

LuckyWell [14K]3 years ago

6 0

9514 1404 393

Answer:

d. 14 -3x

Step-by-step explanation:

If you want to substitute for y in the second equation, you must use the first equation to find an expression for y.

3x +y = 14 . . . . . . first equation

y = 14 -3x . . . . . . subtract 3x from both sides

This gives you the expression for y that you want to use for substitution. It matches the expression of choice D.

y = 14 -3x . . . . matches D

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