Answer:
x = -1
Explanation:
Step 1: combine like terms and subtract 9 from each sides
Step 2: simplify 28 + 4x - 9 to 4x + 19
Step 3: subtract 4 from both sides (-15x - 4x = 19)
Step 4: simplify -15x - 4x to -19x (-19x = 19)
Step 5: divide both sides by -19x