Answer:
1 . [tex]x = -7[/tex]
2. [tex]3= x[/tex] or [tex]x = 3[/tex]
3. [tex]x = -12[/tex]
Step-by-step explanation:
1. [tex]10x + 9 -6x=-19[/tex]
[tex]4x + 9 = -19[/tex]
[tex]4x = - 28[/tex]
[tex]\frac{4x}{4} = \frac{-28}{4}[/tex]
[tex]x=-7[/tex]
2. [tex]20= 5x -13 +6x[/tex]
[tex]20 = 11x - 13[/tex]
[tex]33= 11x[/tex]
[tex]\frac{33}{11} = \frac{11x}{11}[/tex]
[tex]3 =x[/tex] or [tex]x = 3[/tex]
3. [tex]-2(x-5)=-14[/tex]
[tex]-2x + 10 = -14[/tex]
[tex]2x = -24[/tex]
[tex]\frac{2x}{2} = \frac{-24}{2}[/tex]
[tex]x = -12[/tex]
