a) x/4 + 11 = 2x - 3
11+3 = 2x-x/4
14 = (8x-x)/4
14*4 = 7x (* signifie multiplié par)
4*14/7 = x
4*2 = x
x = 8
b)7x/3 -2 = 5x/6 + 1
7x/3 - 5x/6 = 1+2
14x/6 - 5x/6 = 3
14x-5x = 3*6
9x = 18
x = 18/9
x = 2
c) (4+3x)/5 = (7x-1)/8
8(4+3x) = 5(7x-1)
32+24x = 35x-5
32+5 = 35x-24x
37 = 11x
x = 37/11
d) (6-x)/3 = (4x+1)/2
2(6-x) = 3(4x+1)
12-2x = 12x+3
12-3 = 12x+2x
9 = 14x
x= 9/14
