Answer:
The question states "up to $460" in charity, which means it can be less than or equal to 460, but not any higher. Then,
$460 to charity (max)
$160+ to Educational (160 being the minimum)
Education is 3x (or higher) than City.
If we denote x to City, and y to Educational, then,
x + y = 460 . And we know that y >= 3x
x + 3x = 4x = 460
x = 115. This means when she donates $115 to City, she will donate 3x (or $345) to Educational. These are the max values; she will not donate higher than $460.
A minimum requirement was placed on Educational earlier. When y = 160, x will be y/3, or $53.34. (This isn't very meaningful, but: This means she donated 213.34, which is still less than $460)
Therefore, x (which is City) can be the range of $53-ish dollars (depending on your region/graph) but no higher than $115.
y (which is Educational) will be as low as $160, but no higher than $345.
Hope this helps
