Answer:
just did this test so im going to copy paste my answer from it
19. 1.5 + T ≤ 5
T is less than or equal to 3.5
20. 40 + 2m ≥ 100
m is greater than or equal to 30
21. We can have the equation:
x + 1 = x + 2 - 1
This would result to:
x + 1 = x + 1
which have the same terms on both sides.
Further, the equation would be:
0 = 0