Question

Help ! Va rog :)
a) 5x-3=3x+11
b)4x+13=3x+15
c) 8x+1=5x-5
d)2(x+1)=6
e)6=4(x+1)-2(x+2)

Answer 1

a) 5x-3=3x+11
5x-3x=11+3
2x=14
x=14/2
x=7

b)4x+13=3x+15
4x-3x=15-13
x=2

c) 8x+1=5x-5
8x-5x=-5-1
3x=-6
x=-6/3
x=-2

d)2(x+1)=6
2x+2=6
2x=6-2
2x=4
x=4/2
x=2

e)6=4(x+1)-2(x+2)
6=4x+4-2x-4
6=2x
2x=6
x=6/2
x=3

Answer 2

a) $5x-3x=11+3 \\ 2x=14 \\ x=7$ S={7}
b) $4x-3x=15-13 \\ x=2$ S={2}
c) $8x-5x=-5-1 \\ 3x=-6 \\ x=-2$ S={ - 2}
d) $2x+2=6 \\ 2x=6-2 \\ 2x=4 \\ x=2$ S={2}
e) $6=4x+4-2x-4 \\ 6=2x \\ x=3$ S={3}