Answer:
4. [tex]\displaystyle -6 = x[/tex]
3. [tex]\displaystyle 1 = x[/tex]
2. [tex]\displaystyle -1 = x[/tex]
1. [tex]\displaystyle 1 = x[/tex]
Step-by-step explanation:
4. 7x - 2 = 9x + 10
- 9x + 2 - 9x + 2
_____________
[tex]\displaystyle \frac{12}{-2} = \frac{-2x}{-2} \\ \\ -6 = x[/tex]
3. 4x + 8 = 3(x - 1) + 12
4x + 8 = 3x - 3 + 12
4x + 8 = 3x + 9
- 4x - 9 - 4x - 9
____________
[tex]\displaystyle \frac{-1}{-1} = \frac{-x}{-1} \\ \\ 1 = x[/tex]
2. 3x + 7 - 2x = 4x + 10
x + 7 = 4x + 10
- 4x - 7 - 4x - 7
____________
[tex]\displaystyle \frac{3}{-3} = \frac{-3x}{-3} \\ \\ -1 = x[/tex]
1. −2x + 8 = 2x + 4
- 2x - 8 - 2x - 8
____________
[tex]\displaystyle \frac{-4}{-4} = \frac{-4x}{-4} \\ \\ 1 = x[/tex]
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