Question

Determine o conjunto solução:

Answer 1

a) 7x-4= 3x+4
7x-3x= 4+4
4x= 8
x= 8/4
x= 2



b) 7+4x=2x-3
4x-2x= -3-7
2x= -10
x= -10/2
x= -5


c) 5(x-2)= 20-5x
5x-10=20-5x
5x+5x= 20+10
10x= 30
x= 30/10
x= 3

d) 5(x-1)=3x+5
5x-5= 3x+5
5x-3x=5+5
2x=10
x=10/2
x=5

e) x/5+x/2=7/10
2x/10 +5x/10= 7/10
2x+5x=7
7x=7
x=7/7
x=1

f) x/7+x/2=9
2x/14 + 7x/14=126/14
2x+7x=126
9x= 126
x= 126/9
x=14

g)x/2+x/3=1
3x/6+2x/6=6/6
3x+2x=6
5x=6
x=6/5


h) x+3/2+2x-1/3=7
3x+9/6+4x-2/6=42/6
3x+9x+4x-2=46
3x+9x+4x=46+2
16x=48
x=48/16
x=3

i)x+4/2+x-3/3=6
6x/6+12/6+6x/6-6/6=6
6x+12+6x-6=6
6x-6x=6-12+6
0x=12
x=12/0
x=12

j)x+8/5-x+2/3=2
15x/15+24/15-15x/15+10/15=2
15x+24-15x+10=2
15x-15x= 2-24-10
0x= -32
x= -32/0
x=-32