Question

me ajudem por favor estou precisando demais​

Answer 1

a)2(2x+1)=30

4+2=30

b)3(4x−3)=−12

   12−9=−12

c)4(2x−7)=20

  8−28=20

d)7(3x−4)=63

  21−28=63

e)6(3x+3)=−72

   18+18=−72

f)−2(6x−3)=6

    −12+6=6

eu so sei isso

Answer 2

a) 2(2x + 1) = 30

4x + 2 = 30

4x = 30 - 2

4x = 28

x = 28 / 4

x = 7

b) 3(4x - 3) = -12

12x - 9 = -12

12x = -12 + 9

12x = -3

x = -3 / 12

x = -0,25

c) 4(2x - 7) = 20

8x - 28 = 20

8x = 20 + 28

8x = 48

x = 48 / 8

x = 6

d) 7(3x - 4) = 63

21x - 28 = 63

21x = 63 + 28

21x = 91

x = 91 / 21

x = 4,333...

e) 6(3x + 3) = -72

18x + 18 = -72

18x = -72 - 18

18x = -90

x = -90 / 18

x = -5

f) -2(6x - 3) = 6

-12x + 6 = 6

-12x = 6 - 6

-12x = 0

x = 0 / -12

x = 0

2.a) 3(x - 2) = x + 4

3x - 6 = x + 4

3x - x = 4 + 6

2x = 10

x = 10 / 2

x = 5

b) 4(t - 3) = 3 - t

4t - 12 = 3 - t

4t + t = 3 + 12

5t = 15

t = 15 / 5

t = 3

c) 3(2y - 1) = 4y - 5

6y - 3 = 4y - 5

6y - 4y = -5 + 3

2y = -2

y = -2 / 2

y = -1