1.
multiply 3 with the variable and number in the bracket
so (3x+6)
then multiply 4 with the variable and number in the bracket
so (4x-20)
New equation:
(3x+6)+ (4x-20)
Combine like terms and add them
so 4x+3x and 6-20
remember the rules of negative with positives
ur new equation is
7x-14
now you can divide to find x
divide 7 on both sides
so
x=-2