Question

84=-19+a/4 wgat is tje answer

Answer 1

84=-19+a/4
+19+19 {add 19 to both sides
65=a/4
*4    *4 {multiply by 4 to isolate the variable
[260=a]

Answer 2

Flip the equation. $\frac{1}{4} a$− 19=84
and add 19 to both sides
$\frac{1}{4} a$−19+19=84+19

$\frac{1}{4} a$=103
so than multiply by 4
4*($\frac{1}{4} a$)(4)*(103)

Your final answer would be
a=412