Bonjour !
[tex]2x - 3 = -1\\2x=2\\x=\frac{2}{2} =1\\\\S=\{1\}[/tex]
[tex]6 - x = x + \frac{4}{3} \\6-2x=\frac{4}{3}\\-2x=-\frac{14}{3} \\x=-\frac{14}{3}\times\frac{-1}{2} \\x=\frac{14}{6} \\x=\frac{7}{3} \\\\S=\{\frac{7}{3}\}[/tex]
[tex]2x - (3 - 4x) = 1 - x\\2x-3+4x=1-x\\6x-3=1-x\\7x-3=1\\7x=4\\x=\frac{4}{7} \\\\S=\{\frac{4}{7}\}[/tex]
Bonne soirée
Bonjour,
2x - 3 = -1
2x = -1+3
2x = +2
x=2/2
x= 1
6 - x = x + 4/3
6 -4/3 = x+x
18/3 - 4/3 = 2x
14/3 = 2x
x = (14/3)/2
x = 14/3 * 1/2
x= 14/6
x = 7/3
2x - (3 - 4x) = 1 - x
2x -3 +4x= 1-x
2x+ 4x +x = 1+3
7x = 4
x = 4/7
