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## Sagot :

Take #60. Those are two lines.

-- One line is

**. That's a vertical line that crosses the x-axis where x=-5, and EVERY POINT on it is at x=-5 no matter what 'y' is at that point.**

*x=-5*-- The other line is

**. That's a horizontal line that crosses the y-axis where y=2, and EVERY POINT on it is at y=2 no matter what 'x' is at that point.**

*y=2*So you have the intersection of two lines. On one of them, 'x' is always -5. On the other one, 'y' is always 2 . Now what do you suppose the coordinates will be at the point where they cross ? Could it possibly be anything different from (-5, 2) ? ?

In #62:

On the first line, 'y' is always -6. On the other line, 'x' is always 1.

They MUST intersect at (1, -6) .

In #64:

On one line, 'y' is always -1. On the other line, 'x' is always zero.

(The line where 'x' is always zero happens to be the y-axis.)

I'm SURE that by now you know where these two lines intersect.

You don't even have to graph any of these to know where they intersect !

You can just look at the problem and the coordinate pair jumps out at you.