lets find out....lets say a = 4 and b = 2
x + a = b
x + 4 = 2
x = 2 - 4
x = -2
now.....what happens to x if a increases and b stays the same...
lets let a = 5 and b will still be 2...
x + a = b
x + 5 = 2
x = 2 - 5
x = -3
according to this, x will be smaller
lets check again...with negatives
x + a = b...x = -3 and b = 2
x - 3 = 2
x = 5
now x = -2 and b = 2
x + a = b
x - 2 = 2
x = 4
yep.....x gets smaller
