Réponse :
a.
[tex]\frac{3}{4} x=5\\\\\\\frac{ \frac{3}{4} x}{\frac{3}{4} } = \frac{5}{\frac{3}{4} } \\\\x=5 \times \frac{4}{3} \\\\x=\frac{20}{3}[/tex]
b.
[tex]4x-3=11\\\\4x-3+3=11+3\\4x = 14\\\\\frac{4x}{4} =\frac{14}{4\\} \\x=\frac{14}{4} \\\\x=\frac{7}{2}\\[/tex]
c.
[tex]7-8x=56\\7-8x-7=56-7\\-8x=49\\\\\frac{-8x}{-8} =\frac{49}{-8} \\\\x = -\frac{49}{8} \\[/tex]
d.
[tex]6x-4=3x+14\\6x-4-3x=3x+14-3x\\3x-4=14\\3x-4+4=14+4\\3x=18\\\\\frac{3x}{3} =\frac{18}{3} \\\\x=6[/tex]
e.
[tex]9-2x = 11 + 4x\\9-2x-9=11+4x-9\\-2x=2+4x\\-2x-4x=2+4x-4x\\-6x=2\\\frac{-6x}{-6} =\frac{2}{-6} \\x=-\frac{1}{3}[/tex]
