Question

ayida porfavorrrrrrrrrrtt​

Answer 1

Explicación paso a paso:

a)3x + 1 = 7

3x = 7 - 1

3x = 6

x = 6/3

x = 2

b)2a - 2 = 1 + 3a

-2 +1 = 3a - 2a

-1 = a

c)2y + 7 = y + 15

2y - y = 15 - 7

y = 8

d)n + 2n + 4 = - 18n + 3

3n + 18n = 4 - 3

21n = 1

n = 1/21