Question

me ajudem nestas equacoes por favor
a) 3×-9=×+6
b) 2y-9=21
c) 3×+2=×-3
d) 2×+10=×+8+10
e) 2×-1=×+5
f) 6×+12=-18×+36​

Answer 1

a) 3x - 9 = x + 6

3x - x = 6 + 9

2x = 15

x = 15/2

b) 2y - 9 = 21

2y = 21 + 9

2y = 30

y = 30/2

y = 15

c) 3x + 2 = x - 3

3x - x = - 3 - 2

2x = - 5

x = - 5/2

d) 2x + 10 = x + 8 + 10

2x + 10 = x + 18

2x - x = 18 - 10

x = 8

e) 2x - 1 = x + 5

2x - x = 5 + 1

x = 6

f) 6x + 12 = - 18x + 36

6x + 18x = 36 - 12

24x = 24

x = 24/24

x = 1

Answer 2

a) 3x - 9 = x + 6

3x - x = 6 + 9

2x = 15

x = 15/2

x = 7,5

b) 2y - 9 = 21

2y = 21 + 9

2y = 30

y = 30/2

y = 15

c) 3x + 2 = x - 3

3x - x = -3 - 2

2x = -5

x = -5/2

x = -2,5

d) 2x + 10 = x + 8 + 10

2x - x = 10 + 8 - 10

x = 8

e) 2x - 1 = x + 5

2x - x = 5 + 1

x = 6

f) 6x + 12 = -18x + 36

6x + 18x = 36 - 12

24x = 24

x = 24/24

x = 1