1)
2x=-7
2x:2=-7:2
x=-7:2
[tex]x = - \frac{7}{2} [/tex]
2)
(x+2):2=4
[tex] \frac{x + 2}{2} = 4 \\ \\ 2 \times \frac{x + 2}{2} = 2 \times 4 [/tex]
x+2=8
x+2-2=8-2
x=8-2
x=6
3)
[tex] \frac{x-3}{4} = x + 1 \\ \\ 4 \times \frac{x-3}{4} = 4(x+1) \\ \\ [/tex] x-3=4x+4
x-4x-3=4x-4x+4
x-4x-3=4
x-4x-3+3=4+3
x-4x=4+3
-3x=7
-3x:(-3)=7:(-3)
x=7:(-3)
x=-7:3
[tex] x = - \frac{7}{3} [/tex]
