Answer:
10000
Step-by-step explanation:
you have four digits and each one of them can be 0-9, so 10 possibilities for each digit
10×10×10×10= 10,000
Factor out the common term 55
5(x+y)=10
Divide both sides by 55
x+y=10/5
Simplify
Subtract y from both sides
<u>x=2-y </u>
If b+2(a+1) = c, find the value of a+1
Subtract b from both sides: b+2(a+1) - b = c - b
2(a+1) = c - b
Divide both sides by 2:
a+1 = (c - b) /2