2x-3/12-2x+5/8 aidez moi svp

bonsoir

2 x - 3/12 - 2 x + 5/8

=  48 x /24 - 6/24 - 48 x / 24 + 15/24
=  9/24 

2×-3/12-2×+5/8
=2 (-3/12-5/8)
=2 (-6/24-15/24)
=2×-21/24
=2×-21/12×2
=-21/12
=-7/4