24) 3x - 4 - x = 12
2x - 4 = 12
2x = 12 + 4
2x = 16
x = 8
Option D.
25) 2x + 3 = 3(x + 2)
2x + 3 = 3x + 6
3 - 6 = 3x - 2x
- 3 = x
Option D again.
26) [tex] \frac{m}{2.8} - 4.9 = - 7.11 [/tex]
[tex] \frac{m}{2.8} = - 7.11 + 4.9[/tex]
m = 2.8(-7.11 + 4.9)
m = - 6.188
None of your options are correct, though I'm willing to bet that option C is supposed to be this selection.
27) - 11 ≥ 6 - 2n - 5
- 11 ≥ - 2n + 1
- 12 ≥ - 2n
6 ≤ n so n ≥ 6
Closed circle on 6, arrow should go to the right. Option C
28) - 11 = 6 - 2n - 5
Same as above. n = 6. None of those are correct again (your teacher needs to pay attention to their worksheets). Option A or Option C, I guess.
29) - 2x ≥ 4(x + 3)
- 2x ≥ 4x + 12
- 2x - 4x ≥ 12
- 6x ≥ 12
x ≤ - 2
Option B
