Bonjour..pouvez vous m'aider a faire les equations suivant:
a) 2x-5=3(x+8)
b)15-6y=2y-4(y+1)
c)1-3(4-3x)=-11+5x
d)4(7+2y)=7-4(6-3y)
merciiiii........
a) 2x-5 = 3(x+8)
2x -5 = 3x +24
2x -3x = +5 +24
-x = 29
x = --29
15 -6y = 2y -4 (y +1)
15 -6y = 2y -4y -4
15 -6y = -2y -4
-6y +2y = -15 -4
-4y = -19
y = -19/-4 y = 19/4
1 -3 (4-3x) = -11 +5x
1 -12 +9x = -11 +5x
-11 +9x = -11 +5x
+9x -5x = +11 -11
+4x = 0
4(7+2y) = 7 -4(6-3y)
28 +8y = 7 -24 +12y
8y -12y = -28 +7 -24
-4y = -45
y= -45/4