Question

Yep and I need help again! -_-

Answer 1

Answer:

a=-7

Step-by-step explanation:

$Given:\frac{a+4}{3}-\frac{a}{7} = \frac{a+7}{5}$

LCM of 3,7,5 = 105.

$=>\frac{a+4}{3}*105-\frac{a}{7}*105=\frac{a+7}{5}*105$

$=>35(a+4)-15a=21(a+7)$

$=>35a+140-15a=21a+147$

$=>20a+140=21a+147$

$=>20a-21a=147-140$

$=>-a=7$

$=>\boxed{a=-7}$

Hope it helps!

Answer 2

Answer:

=-7

Step-by-step explanation:

Given:\frac{a+4}{3}-\frac{a}{7} = \frac{a+7}{5}Given:

3

a+4

−

7

a

=

5

a+7

LCM of 3,7,5 = 105.

= > \frac{a+4}{3}*105-\frac{a}{7}*105=\frac{a+7}{5}*105=>

3

a+4

∗105−

7

a

∗105=

5

a+7

∗105

= > 35(a+4)-15a=21(a+7)=>35(a+4)−15a=21(a+7)

= > 35a+140-15a=21a+147=>35a+140−15a=21a+147

= > 20a+140=21a+147=>20a+140=21a+147

= > 20a-21a=147-140=>20a−21a=147−140

= > -a=7=>−a=7

= > \boxed{a=-7}=>

a=−7