You can
put this solution on YOUR website! 1.
9/3 + 3a/4 = 13/3
The LCD of the denominators 3, 4, and 3 is 12. So
multiply every term by 12·
12·9/3 + 12·3a/4 = 12·13/3
36 + 9a = 52
Solve that and get a = 16/9
2.
5x - 2/3 = 8 - 3x/5
The LCD of the denominators 3 and 5 is 15. So
multiply every term by 15·
15·5x - 15·2/3 = 15·8 - 15·3x/5
75x - 10 = 120 - 9x
Solve that and get x = 65/42
3.
b - 2/b + 4 = b + 1/b + 10
The LCD of the denominators b and b is b. So
multiply every term by b·
b·b - b·2/b + b·4 = b·b + b·1/b + b·10
b² - 2 + 4b = b² + 1 + 10b
Solve that and get b = -1/2
4.
5y - 1/2 - 3y + 5 = 7y + 13/6
I'll let you do that one by yourself. Answer = 7/15
Edwin
