just multiply x to each term in the second equation
the multiply -3 to each term in the second equation.
then combine like terms.
all answers have the same fron and last terms so what about the middle ones.
x and -x = - x^2
-3 and 2x^2 = - 6x^2
add those for -7x^2 so we cut our answers in half
x and 3 = 3x
-3 and -x = 3x
add those for 6x
now we know it is the last answer
just multiply x to each term in the second equation
the multiply -3 to each term in the second equation.
then combine like terms.
all answers have the same fron and last terms so what about the middle ones.
x and -x = - x^2
-3 and 2x^2 = - 6x^2
add those for -7x^2 so we cut our answers in half
x and 3 = 3x
-3 and -x = 3x
add those for 6x
now we know it is the last answer