4 is 80% of 5, because 1 is worth 20%
The constant is -12. I think of constant as the "lonely little number".... Hope this helped =)
X+y=43
x-y=19
2x=62
x=31
y=12
Hope this helps!
Answer:
ONE SOLUTION, around (0.5, -4)
Step-by-step explanation:
Not sure if this was what you were looking for, but I believe it has one solution!
Answer:
4 cm
Step-by-step explanation:
The perimeter of the original rectangle is ...
P = 2(L+W) = 2(4x + x) = 10x
The perimeter of the larger rectangle after we add "a" to each side is ...
P = 2(L +W)
= 2((4x+a) +(x+a))
= 10x +4a = 10x +16
4a = 16 . . . . . subtract 10x from both sides
a = 4 . . . . . . . divide by 4
The length added to each side is 4 cm.