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1. Which point is a solution to this system of equations? 3х - у = 7 and 2x + 3y = 1​

User Alex Trott
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1 Answer

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Answer:

(x, y) = (2, -1)

Explanation:

A graphing calculator can find a solution quickly. (see attached)

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The first equation can give an expression for y:

y = 3x -7

We can substitute this into the second equation:

2x +3(3x -7) = 1

11x -21 = 1 . . . . . . simplify

11x = 22 . . . . . . . add 21

x = 2 . . . . . . . divide by 2

y = 3(2) -7 = -1 . . . . using our equation for y

The solution is (x, y) = (2, -1).

1. Which point is a solution to this system of equations? 3х - у = 7 and 2x + 3y = 1​-example-1
User Rafael Berro
by
8.1k points