Bonsoir,
a. 4 ( x + 5 ) = 10x + 3
4x + 25 = 10x + 3
4x - 10x = 3 - 25
-6x = -22
x = 11/3
b. 3 ( x - 2 ) = 6 ( x + 4 )
3x - 6 = 6x + 24
3x - 6x = 6x + 24
-3x = 30
x = -10
c. 7x - ( 5x + 3 ) = 5 ( x - 3 ) + 2
7x - 8x = 5x + 2 + 2
-1x - 5x = 4
x = 4
d. 7 ( n + 2 ) - 3 = 25 - ( 3n + 4 )
7n + 14 - 3 = 25 - 7n
7n + 11 = 25 - 7n
7n + 7n = 25 - 11
14n = 14
n = 1
e. 4y + 3 ( 4y - 2 ) = 3 ( y + 1 )
4y + 12y - 6 = 3y + 3
16y - 3y = 3 + 6
13y = 9
y = 9/13
