Given: -20=-4x-6x Since all the signs in this equation are negative, change the
signs to positive to make the solution a little easier to deal with and obvious.
Use the fact: The product of two like signs makes a positive sign, and the product
of two unlike signs makes a negative sign.
Thus, we first multiply both sides by -1 to change negative signs to positive ones:
(-1)·(-20)=(-1)·(-4x-6x), so we have: 20=4x+6x That is: 20=10x
Swap sides: 10x=20
Divide both sides by 10 to get x by itself. we have: x=2
CK: Plug x=2 into the right side of equation given: -4(2)-6(2)=-8-12=-20
so LHS=RHS CKD.
The answer is: x=2