Explications étape par étape:
1) -3x -6 +10x -20 = 4x -12
7x -26 = 4x - 12
7x - 4x = -12 +26 -3x = 14 x = -14/3
2) il y a quoi entre 3/5 et (2x -3)? c´est facteur?
3) 2x-3 = 0 ou 7+ 5x = 0
si 2x -3 =0. 2x = 3 x = 3/2 = 1,5
si 7 + 5x = 0. 5x = -7 x = -7/5
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Explications étape par étape:
1) -3x -6 +10x -20 = 4x -12
7x -26 = 4x - 12
7x - 4x = -12 +26 -3x = 14 x = -14/3
2) il y a quoi entre 3/5 et (2x -3)? c´est facteur?
3) 2x-3 = 0 ou 7+ 5x = 0
si 2x -3 =0. 2x = 3 x = 3/2 = 1,5
si 7 + 5x = 0. 5x = -7 x = -7/5