Just wanna know by steps the easyest way to solve this question

X•y=20

x+y=9
y=9-x

x(9-x)=20

9x-x^2=20
-x^2+9x-20 =0

then, you just fact and you can use the same process.
to explain what I just did:
So, it says that the first integer times the second equals 20.
So, x times y = 20
or, x•y=20.

It also says that x plus y is 9. So,
x+y=9. Then, you solve to find one of the integers.
So, if you subtract x from both sides, you get
y=9-x.
Then, since you know what y is, you can plug that in for x•y=20.

Then, you just solve from there. Let me know if you need more help.

38+105= 143, 39+104=143, and you will find then adding the numbers on opposite sides, moving inwards yields the answer 138 every time. because of this, you’re going to multiply 138 times the number of pairs, which is 34. therefore, 34*138= 4692(i’m sorry if it’s the wrong numbers, but it’s the right concept)