Problem
Which expression is equivalent to \( (4 g-4)- \) \( (7 g+9) ? \) \[ (-4 g+4)-(9 g+7) \] \[ (-4+4 g)-(9+7 g) \] \[ -16 g \] \[ -13 g-3 \]
Solution
Step 1 ：\( (4 g-4)-(7 g+9) = 4g - 4 - 7g - 9 \)
Step 2 ：\( = -3g - 13 \)
Step 3 ：\( = -3(g+4) \)
