Question

resolva as equações:

a)3x+9=81
b)2x+9=81
c)x+9=81
d)3x-9=81
e)2t+t=10
f)8c+4=12

ME AJUDEM POR FAVOR!

Answer 1

a)3 x + 9 = 81

3 x = 81 - 9

3 x = 72

x = 72/3

x = 24

b)2 x + 9 = 81

2 x = 81 - 9

2 x = 72

x = 72/2

x = 36

c)x + 9 = 81

x = 81 - 9

x = 72

d)3 x - 9 = 81

3 x = 81 + 9

3 x = 90

x = 90 / 3

x = 30

e)2 t + t = 10

3 t = 10

t = 10/3

f)8 c + 4 = 12

8 c = 12 - 4

8 c = 8

c = 8/8

c = 1

Answer 2

a) 3x + 9 = 81

3x = 81-9

3x = 72

x = 72/3

x = 24

b) 2x + 9 =81

2x = 81 - 9

2x = 72

x = 72/2

x = 36

c) x + 9 = 81

x = 81-9

x = 72

d) 3x - 9 = 81

3x = 81 + 9

3x = 90

x = 90/3

x = 30

e) 2t + t = 10

3t = 10

t = 10/3

f) 8c + 4 = 12

8c = 12 - 4

8c = 8

c = 8/8

c = 1