Answer:
b = 22
Step-by-step explanation:
3 (b - 20) = - (6 - 12)
step 1: distribute the 3 on the left to all the numbers in the parentheses on the left
3b - 60 = - (6 - 12)
step 2: distribute the negative to all the numbers in the parentheses on the right
3b - 60 = -6 +12
step 3: add -6 and 12
3b - 60 = 6
step 4: add 60 to both sides, the 60 on the left will cancel out
3b = 66
step 5: divide 66 by 3
b = 22
