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GuDViN [60]
2 years ago
11

PLEASE HELP

Mathematics
2 answers:
Alenkinab [10]2 years ago
6 0

Answer:

B. Substitute 9x for y in the first equation

Step-by-step explanation:

There are various ways of solving a system of linear equations:

- Graphing

- Substitution

- Elimination

Here, given that we have two equations that are equal to y in terms of x, we can use substitution and essentially either plug in the expression (7x + 3) in for y in the second equation or plug in the expression (9x) in for y in the first equation.

Look at the answer choices: only B matches, so it's the correct answer.

Olegator [25]2 years ago
3 0

Step-by-step explanation:

<u>Step 1:  Find the most reasonable step</u>

<em>Option A:</em>  It doesn't make sense because that will not help us solve the system of equation.

<em>Option B: </em> This option makes sense because you can then solve for x.

<em>Option C:</em>  It doesn't make sense because that will not help us solve the system of equation.

<em>Option D: </em> It doesn't make sense because that will not help us solve the system of equation.

Answer:  Option B

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