Sagot :
a. 5x=3x+1
5x-3x=1
2x=1
x=1/2
x=0.5
b.8x=12x+4
8x-12x=4
-4x=4
x=4/-4
x=-1
c. 4-7y=10y
-7y-10y=-4
-17y=-4
y=-4/-17
y=4/17
d. 7x+1=-4-x
7x+x=-4-1
8x=-5
x=-5/8
e. 2+3x=7-3x
3x+3x=7-2
6x=5
x=5/6
f.5+6x=-x-9
6x+x=-9-5
7x=-14
x=-14/7
g. 11x+3=8x+7
11x-8x=7-3
3x=4
x=4/3
h. 5.5x+1.5=9x+6
5.5x-9x=6-1.5
-3.5x=4.5
x=4.5/-3.5
i. 7-3.3x=2x-9.7
-3.3x-2x=-9.7-7
1.3x=-16.7
x=-16.7/1.3
j. 5.1-x=-8x+1.7
-x+8x=1.7-5.1
7x=-3.4
x=-3.4/7