Question

1 a) x+4=21 b) 3x+9=x-11 c)7(x-1)=2(3x+1)

Answer 1

A) X+4 = 21
    
X= -4 +21

X= 17

B) 3X + 9 = X- 11

3X-X = -9 - 11

2X = -20

X= -20/2

X= -10

C) 7(X-1) = 2 (3X +1)

7X -7 = 6X + 2 

7X -6X = 7 +2

X= 9