6510x+4650(x+2)=4278

bonsoir

6510 x + 4 650 x + 9 300 = 4278
4 650 x = 4 278 - 9 300 - 6 510
4 650 x = - 11 532
x = - 2,48

6510x + 4650x +2*4650 = 4278
11160x + 9300 = 4278
11160x = 4278-9300
11160x = -5022
x = -5022/11160
x = -4,33