Answer:
b 7&12..........................
b = 7
Step-by-step explanation:
7b - 3 = 6b + 4
1. subtract 6b on both sides of the equation
b - 3 = 4
2. add 3 to both sides
Combining like terms together we get 4x - 7x = -3x and 4 - 9 = -5 so the answer is 8x² - 3x - 5.