# Math Help - help :)

1. ## help :)

How do I do this
A+3 over 8 + a over 5 = 2
how do i solve and check it?

2. Originally Posted by happyboy
How do I do this
A+3 over 8 + a over 5 = 2
how do i solve and check it?
Take LCM and then cross multiply.

Keep Smiling
Malay

3. A = 5 cross multiple the LHS so u get 5A + 15 + 8A all over 40 = 2 the rest is easy

4. Originally Posted by happyboy
How do I do this
A+3 over 8 + a over 5 = 2
how do i solve and check it?
It's easier to understand if you see the work...

$\frac{A+3}{8}+\frac{a}{5}=2$ you need a common denominator

$\frac{\left(A+3\right)\cdot5}{8\cdot5}+\frac{a \cdot 8}{5 \cdot 8}=2$ Simplify

$\frac{5A+15}{40}+\frac{8a}{40}=2$ add the fractions..

$\frac{5A+15+8a}{40}=2$ Multiply both sides by 40

$5A+15+8a=2\cdot40$ subtract 15 from both sides

$5A+8a=80-15$ It's possible now to solve for both "A" and "a" but did you do a typo and they're really the same variable?

$5A+8a=80-15$ assuming they are...add them together

$13A=65$ and divide by 13

$A=65\div13$ and the answer is....

$A=5$

5. Originally Posted by happyboy
How do I do this
A+3 over 8 + a over 5 = 2
how do i solve and check it?
You can mean,
$\frac{\left( \frac{A+3}{8+A}\right)}{5}=2$
or,
$\frac{A+3}{\left( \frac{8+A}{5} \right)}=2$
Which one is it, if any?