Question

resolva as equações a) 6×=2×+16 b)4×-10=2×+2. c) 2×+1 =4×-7 d) 3×-2=4×+9 e)5×+4=3×-2×+4. f)×+×-4=17-2×+1 g)3,4×-2,6=× -0,92. h) 0,1×+3×+0,9×=14+2×

Answer 1

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

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

c)2x+1=4x-7
2x-4x=-7-1
-2x=-8*(-1)
2x=8
x=8/2
x=4

d)3x-2=4x+9
3x-4x=9+2
-x=11*(-1)
x=-11

e)5x+4=3x-2x+4
5x+4=x+4
5x-x=4-4
4x=0
x=0/4
x=0

f)x+x-4=17-2x+1
2x-4=18-2x
2x+2x=18+4
4x=22
x=22/4
x=11/2
x=5,5

g)3,4x-2,6=x-0,92
3,4x-x=-0,92+2,6
2,4x=1,68
x=1,68/2,4
x=0.7

h)0,1x+3x+0,9x=14+2x
4x=14+2x
4x-2x=14
x=14/2
x=7

Answer 2

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

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

c) 2x +1 = 4x -7
+1 + 7 = 4x -2x
8 = 2x
x = 8/2
x = 4

d) 3x - 2 = 4x +9
3x - 4x = 9+2
-x = 11   (-x/-1)
x= 11
 
e) não sei

f) x + x - 4 = 17 - 2x +1
2x + 2x = 17 + 1 + 4
4x = 22
x= 22/4
x = 5,5
 
o resto eu não sei