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Need help easy points

Need help easy points-example-1
User Steve Cook
by
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2 Answers

4 votes

Answer: Well we tried to help you...

Explanation:

User JR Lawhorne
by
7.8k points
3 votes

You can plug in each point into both equations to find your answer, or you can do substitution:

y = 3x - 10

2x + 3y = 3


Plug in the first equation into the second equation:

2x + 3y = 3

2x + 3(3x - 10) = 3 [since y = 3x - 10, you can substitute (3x - 10) for y]

Multiply/distribute 3 into (3x - 10)

2x + 9x - 30 = 3

11x - 30 = 3 Add 30 on both sides

11x = 33 Divide 11 on both sides

x = 3


Now that you know x, you can plug it into one of the equations to find y

y = 3x - 10

y = 3(3) - 10

y = 9 - 10

y = -1


(3, -1)



[proof]

y = 3x - 10

-1 = 3(3) - 10

-1 = 9 - 10

-1 = -1


2x + 3y = 3

2(3) + 3(-1) = 3

6 - 3 = 3

3 = 3

User Kelu Thatsall
by
8.3k points

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