It may help if you look your question you asked up and look were it is on math-way
-3x-13
since there is no x value the equation can not be solved any further.
:)))))
Let airspeed of the plane be x mph and wind speed = y mph. Then we have the following system of equations
x - y = 1160 / 4.833 = 240.0166
and
x + y = 1160 / 4 = 290
adding the 2 equations:-
2x = 530.0166
x = 265 mph = airspeed of the plane
y = 290 - 265 = 25 mph = speed of the wind
You add them together and divide that sum by 2
She has to read 136 pages each week to achieve her goal because 1,500-412=1,088. so she has 1,088 pages left to read in 8 weeks. then you divide 1,088/8=136 ( I hope this helps )