You can use equations to describe the relationship between the two numbers.
x+240=y
y-240=x
Answer:
a= 2/b-c
Step-by-step explanation:
We want isolate for a or to be itself
ab-ac=2
factor out a
a (b-c)=2
Now bring b-c to the other side
a (b-c)/(b-c)=2/b-c
The b-c cancel each other out
a= 2/(b-c)
The formula to find the amount is

Here A = amount
P is the principal
r is the rate
n is the number of years
Then to find the interest we subtract principal from amount.
Interest = A - P
Here
P= 2200, r = 3% = 0.03 , n = 6 years

Hence the interest earned = 2626.92-2200 = $426.92
Now if the total of $2200 was deposited in three banks then each account earns 
Each account earns $142.31
The equation is already in Standard Form.
Answer:
10) x=9
11) x=25
Step-by-step explanation:
a triangle is 180º total
10) 2x+8x+90=180
10x=90
x=9
11) 3x+1+2x+2+2x+2=180
7x+5=180
7x=175
x=25