bonjour
3x - 2 = 7x - 5
3x - 2 + 2 = 7x - 5 + 2
3x = 7x - 3
3x - 7x = 7x - 7x - 3
-4x = -3
x = 3/4
et
-8x + 2 = -2x - 3
-8x + 2 - 2 = -2x - 3 - 2
-8x = -2x - 5
-8x + 2x = -2x + 2x - 5
-6x = -5
x = 5/6
Bonjour !
1)
[tex]3x-2=7x-5\\-4x-2=-5\\-4x=-3\\x=\frac{-3}{-4} =\frac{3}{4}[/tex]
[tex]S=\{\frac{3}{4} \}[/tex]
2)
[tex]-8x+2=-2x-3\\-6x+2=-3\\-6x=-5\\x=\frac{-5}{-6} =\frac{5}{6}[/tex]
[tex]S=\{\frac{5}{6} \}[/tex]
Bonne journée
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bonjour
3x - 2 = 7x - 5
3x - 2 + 2 = 7x - 5 + 2
3x = 7x - 3
3x - 7x = 7x - 7x - 3
-4x = -3
x = 3/4
et
-8x + 2 = -2x - 3
-8x + 2 - 2 = -2x - 3 - 2
-8x = -2x - 5
-8x + 2x = -2x + 2x - 5
-6x = -5
x = 5/6
Verified answer
Bonjour !
1)
[tex]3x-2=7x-5\\-4x-2=-5\\-4x=-3\\x=\frac{-3}{-4} =\frac{3}{4}[/tex]
[tex]S=\{\frac{3}{4} \}[/tex]
2)
[tex]-8x+2=-2x-3\\-6x+2=-3\\-6x=-5\\x=\frac{-5}{-6} =\frac{5}{6}[/tex]
[tex]S=\{\frac{5}{6} \}[/tex]
Bonne journée