Question

a) 3x +8 = 23

b) 5x + 6 = 3x – 12

c) 4y = 9 + y

d) 7y – 3 = 4y + 6

Answer 1

Resposta:

a=5

b=-10

c=3

d=3

Explicação passo-a-passo:

a) 3x +8 = 23

3x=23-8

3x=15

x=15:3

x=5

b)5x + 6 = 3x – 12

5x-3x= -12-6

2x= -20

x= -20:2

x= -10

c) 4y = 9 + y

4y-y= 9

3y= 9

y=9:3

y= 3

d) 7y – 3 = 4y + 6

7y-4y=6+3

3y= 9

y= 9:3

y=3