Answer:
The answer is 3.825 inches, the reduced picture will be 84% of the size of the original
Its basically just subtracting from one another
for example, 6-6 is 6
or -4-3= 7
3x+4y=12
9x-2y=15
we will use elimination
multiply 3x+4y=12 by -3
-9x-12y=-36
9x-2y=15
_________ add
-14y=-21
÷-14 both sides
y=1.5
find x
3x+4 (1.5)=12
3x+6=12
-6 both sides
3x=6
÷3 both sides
x=2
x=2
y=1.5