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Jobisdone [24]
4 years ago
8

Using the system of substitution 2x-3y=12 x + y=9

Mathematics
2 answers:
kenny6666 [7]4 years ago
6 0
Here! I hope this helps! :) Work is in the picture
x=7.8
y=1.2
(7.8,1.2)

enot [183]4 years ago
5 0
2x - 3y = 12
x + y = 9

x + y = 9

Subtract 'x' to both sides:

y = -x + 9

Plug in -x + 9 for 'y' in the first equation

2x - 3(-x + 9) = 12

Distribute -3:

2x + 3x - 27 = 12

Combine like terms:

5x - 27 = 12

Add 27 to both sides:

5x = 39

Divide 5 to both sides:

x = 7.8

Plug this into any of the two equations to find 'y':

x + y = 9

7.8 + y = 9

Subtract 7.8 to both sides:

y = 1.2

So the solution is (7.8, 1.2).
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Answer:

The correct answer is third option

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Step-by-step explanation:

From the given option we get the correct answer is  third option.

(10x² - 4) - (7x² + 3)

<u>Check the correct answer</u>

(10x² - 4) - (7x² + 3) = 10x² - 4 - 7x² - 3)

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