4x + 5x + 12 = -6 (given)
9x + 12 = -6 (simplify)
9x = -18 (subtraction)
x = -2 (addition)
Which reason is incorrect?
A addition
B given
C simplify
D subtraction
1 answer
The reason that is incorrect is D. subtraction. When simplifying the equation, the correct operation is subtraction, not addition.