Question

resolva essas equacoes​

Answer 1

a) 3x-8=13

3x= 13+8

3x = 21

x= 21/3

x= 7

b) 8x-9 = 15+2x

8x - 2x = 15 - 9

6x= 6

x= 6/6

x= 1

c) 2 (x + 5) = 8 (x - 1)

2x + 10 = 8x - 8

2x - 8x = -8 - 10

-6x = -18 (-1)

6x = 18

x= 18/ 6

x=3

d) 5 (y -3 ) = 2y + 6

5y - 15 = 2y + 6

5y - 2y = 6 + 15

3y = 21

y= 21/3

y= 7