a)
[tex]5x - 7 = 3[/tex]
[tex]5 x = 3 + 7[/tex]
[tex]5x = 10[/tex]
[tex]x = 10 \div 5 = 2[/tex]
b)
[tex]13 - 7x = 35 - 4x[/tex]
[tex] - 7x + 4x = 35 - 13[/tex]
[tex] - 3x = 22[/tex]
[tex]x = \frac{22}{ - 3} = - 7 \frac{1}{3} [/tex]
c)
[tex]3(x + 2) = - 2(x - 3)[/tex]
[tex]3x + 6 = - 2x + 6[/tex]
[tex]5x = 0[/tex]
[tex]x = 0 \div 5 = 0[/tex]
