Question

determine o valor de x. a)6x=2x+16 b)2x-5=x+1 c)2x+3=x+4 d)5x+7=4x+10 e)4x-10=2x+2 f)3x+5+23 g)5x-1=14 h)5x-1=14 i)4x-5=2x j)2x+18=0 k)6x+3=5x  j)7x+3=2x+23

Answer 1

a)6x=2x+16
6x - 2x = 16
4x = 16
x = 16/4
x = 4

S[4]

b)2x-5=x+1
2x - x = 1+ 5
x = 6

S[6]

c)2x+3=x+4
2x - x = 4 - 3
x = 1

S[1]

d)5x+7=4x+10
5x - 4x = 10 - 7
x = 3

S[3]


e)4x-10=2x+2 
4x - 2x = 2 + 10
2x = 12
x = 12/2
x = 6

S[6]

f)3x+5=23
3x = 23 - 5
3x = 18
x = 18/3
x= 6

S[6]

g)5x-1=14
5x = 14 + 1
5x = 15
x = 15/5
x = 3

S[3]

h)5x-12=3x
5x - 3x = 12
2x = 12
x = 12/2
x = 6

S[6]

i)4x-5=2x j
4x - 2x = +5
2x = 5
x = 5/2    ou 2,5

S[5/2   ou 2,5]


j)2x+18=0 
2x = -18
x = -18/2
x = - 9

S[-9]


k)6x+3=5x
6x - 5x = - 3
x = - 3

S[- 3]


l)7x+3=2x+23
7x - 2x = 23 - 3
5x = 20
x = 20/5
x = 4

S[4]

Answer 2

a) 6x=2x+16   6x-2x=16  4x=16   x=16/4  x=4

b) 2x-5=x=1  2x-x= 1+5   x=6

c)2x+3=x+4   2x-x= 4-3     x=1

d)5x+7=4x+10 5x-4x=10-7   x=3

e)4x-10=2x+2   4x-2x=2=10    2x=12    x=12/2  x= 6

f) 3x+5=23  3x=23-5   3x=18    x=18/3   x=6

h) 5x-12=3x  5x-3x=12   2x=12  x=12/2  x=6

i) 4x-5=2x  4x-2x=5      2x=5  x= 5/2

j) 2x=18  x=18/2   x= 9

k) 6x+3=5x   6x-5x=-3    x= -3

l) 7x+3=2x+23   7x-2x= 23-3    5x=20  x=20/5   x=4