Sagot :
7a = 3(b - 5)
Distribute 3:
7a = 3b - 15
Add 15 to both sides:
7a + 15 = 3b
Divide 3 to both sides:
b = (7a + 15)/3
Distribute 3:
7a = 3b - 15
Add 15 to both sides:
7a + 15 = 3b
Divide 3 to both sides:
b = (7a + 15)/3