Question

a) 4(x+3)=30
b) 8-3(x+5)=5
c) 2(y-1)-3(y-2)=6
d) 4(5y+1)=27​

Answer 1

Resposta:

a)4,5

b)-4

c)-14

d)1,15

Explicação passo-a-passo:

a) 4.x + 12 = 30

4x = 30-12

4x = 18

x = 18 : 4

x = 4,5

b) 5x + 25 = 5

5x = 5-25

5x = -20

x = -20 : 5

x= -4

c) 2y - 2 - 3y - 6 = 6

2y - 3y = 14

-x = 14 (.-1)

x = -14

d) 20y + 4 = 27

20y = 27 - 4

20y = 23

y = 23:20

y = 1,15

Answer 2

Resposta:

Explicação passo-a-passo:

A) 4(x+3)=30

4x +12= 30

4x = 30-12

4x = 18(:2)

2x= 9

x = 9/2

b)

8-3(x+5)=5

8-3x-15=5

-3x-7=5

-3x= 5+7

-3x= 12 (-1)

3x= -12

X = -12/3

X = - 4

_______

c) 2(y-1)-3(y-2)=6

2y-2-3y+6=6

- y +4 = 6

- y = 6-4

- y = 2 (-1)

y = - 2

d)

4(5y+1)=27​

20y+4=27

20y = 27-4

20y=23

Y = 23/20