Question

me ajudem por favor.
a) 4(2x+7)=2(2x+7)

b)-4(2x+7)=2(2x+7)


c) 11 + 2x = 4-x
3. 5. 5​

Answer 1

a)

8x + 28 = 4x + 14

8x - 4x = 14 - 28

4x = 14

x = 14/4

x = 7/2

b)

- 8x - 14 = 4x + 14

- 8x - 4x = 14 + 14

12x = 28

x = 7/3

c)

2x + x = 4 - 11

3x = - 7

x = 7/3