(2,?) is on the line 4x – 5y = -7. Find the other half of the coordinate.

1 answer:

4 0

$(x,y)=(2,?) \\ x=2 \\ y=? \\ \\
4x-5y=-7 \\
4 \times 2-5y=-7 \\
8-5y=-7 \\
-5y=-7-8 \\
-5y=-15 \\
y=\frac{-15}{-5} \\
y=3$

The coordinate is (2,3).

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