Answer:
X = -7
Step-by-step explanation:
=> 7(x + 4)= -21
multiply all the terms in the bracket by 7
=> 7x + 28 = -21
make x the subject of formula
=> 7x = -21 -28
subtract the value
=> 7x = -49
divide both side by 7
=> x = (-49)/7
divide -49 by 7
=> x = -7
