Answer:
x= -2
Step-by-step explanation:
-2x-7=3(4x+7)
multiply numbers in parenthesis by 3
-2x-7=12x+21
move terms
-2x-12x=21+7
subtract -2x to -12x but since there negative the equation is addition. Also, add 21 to 7
-14x=28
divide both sides by -14
x= -2
