In standard form the answer will be if you go by (Ax+by=c )then I must say it's 3x-7y=9
Answer:
53 mm
Step-by-step explanation:
Perimeter is the sum of the lengths of all its sides.
Let the length of the unknown side be x mm.
123= 25 +45 +x
x= 123 -25 -45
x= 53
Thus, the unknown side is 53 mm.
Answer:
Step-by-step explanation:
3x - 6y = -1
-6y = -1 -3x
-6y = -(1+3x)
y = -(1+3x)/-6
y = (1 + 3x )/6