Point a is on the x-axis, on the left side of the origin, 4 units from the origin, then the coordinate of this point is?

Point a is on the x-axis, on the left side of the origin, 4 units from the origin, then the coordinate of this point is?

x=-4

Given that point P is in the fourth quadrant, 1 unit length from Y-axis and 2 units length from x-axis, then the coordinate of point P is

The fourth quadrant is located at the lower right of the coordinate plane, so the point P coordinate is (1, - 2);
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Point P (3 + m, 3n) and point Q (2m + 1, 2n-1), if PQ / / X axis, then n=___ If PQ / / Y axis, then M=___ .

According to the problem, if PQ / / X axis, the ordinates are equal
So 3N = 2N-1
So n = - 1
If PQ / / Y axis
Then the abscissa is equal
3+m=2m+1
m=2

Given the point P (m, 2), q (- 5, n) PQ / / Y axis, then M =?, n =?

The slope of PQ is (n-2) / (- 5-m). When PQ is parallel to y-axis, the slope does not exist. That is to say, the above fraction is meaningless, so m = - 5