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qaws [65]
2 years ago
12

Solve the system of equations using the substitution method.

Mathematics
1 answer:
Mademuasel [1]2 years ago
3 0

Answer:

x = -2.

y = 3.

Step-by-step explanation:

If y = 3x + 9

Substitute this value for y in the first equation.

4x + 5(3x + 9) = 7

4x + 15x + 45 = 7

19x = 7 - 45

19x = -38

x = -38/19

x = -2.

with this value of x, substitute -2 in the second equation

y = 3(-2) + 9

y = -6+9

y = 3.

check if your values are all correct

4(-2) + 5(3) = 7

-8 + 15 = 15 - 8 = 7

Correct!

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4 years ago
4. What is the equation of line passing through (-2,4) and parallel to the line y<br> + 3x = 4?
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Answer:

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Step-by-step explanation:

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step 2- use the point slope form which is y-y1=m(x-x1)

and substitute in the numbers (only substitute y1,x1, and m)

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3 years ago
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<h2>—Math</h2>

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Answer:

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