[URGENT] Bonsoir, je n'arrive pas à ces 2 equations :
La 1er equation est : 2(x-4)=3x-20
La 2e equation est : 2y-8(y+1)=5y-(y-3)
Merci beaucoup d'avance..
La 1er equation est:
2(x-4) = 3x-20
2x-8 = 3x-20
2x-3x = -20+8
-x = -12
x = 12
La 2e equation est:
2y-8(y+1) = 5y-(y-3)
2y-8y-8 = -5y+15y
2y-8y-15y = 8
-21y = 8
y = -2,625
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La 1er equation est:
2(x-4) = 3x-20
2x-8 = 3x-20
2x-3x = -20+8
-x = -12
x = 12
La 2e equation est:
2y-8(y+1) = 5y-(y-3)
2y-8y-8 = -5y+15y
2y-8y-15y = 8
-21y = 8
y = -2,625