Question

d) 3(x+7) - 4=7. x. -1​

Answer 1

Step-by-step explanation:

if X=-1

then

3(-1+7)-4 =7

3(6)-4=7

18-4=7

14 is not =to 7

therefore it is not true

Answer 2

Step-by-step explanation:

3(x+7)-4= 7*x*(-1)

3x+21 - 4 = - 7x

3x + 17 = - 7x

3x+7x = - 17

10x = - 17

x= - 17/10

x= - 1.7