A bus is at P, a place 250km east from Q. Travelling a distance of 400 km to due west of P it reaxhes at R. Express this information by scale drawing and find the distance from Q to R and the bearing of Q to R. With process​

2x - 20 = 32 20 - 3x = 8 6x - 8 = 16 -13 - 3x = -10

65 8 7 4 5 6 8 4 3 2 1 9 5 6 4 2 1 6 5 1 5 1 3 2 3 5 multiply the third number in the first row by the seventh number in the third row. add this result to the fifth number in the second row. add to this total ten times the fourth number in the third row. subtract the eighth number in the first row from the result.

What is the difference between the equations of a vertical and a horizontal line?