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5 votes
5 votes
Find the coordinate of the points of intersection of the graphs without building them: 20x - 15y = 100 and 3x - 5 =6y

User Hooknc
by
1.9k points

2 Answers

26 votes
26 votes

Answer:

(-4.666667, -3.16667)

Explanation:

(-4 2/3, -3 1/6)

User Bri Bri
by
3.0k points
7 votes
7 votes

9514 1404 393

Answer:

(x, y) = (7, 2 2/3)

Explanation:

We can multiply the first equation by 2/5 to get ...

8x -6y = 40

The second equation gives an expression for 6y that we can substitute.

8x -(3x -5) = 40

5x +5 = 40 . . . . . eliminate parentheses

x +1 = 8 . . . . . . . .divide by 5

x = 7 . . . . . . . . . .subtract 1

Using the second equation, we find ...

3(7) -5 = 6y

y = 16/6 = 2 2/3

The coordinates of the point of intersection are (x, y) = (7, 2 2/3).

Find the coordinate of the points of intersection of the graphs without building them-example-1
User Cmcginty
by
3.5k points
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