Question

What is the sum of 30 and the difference is 10?

Answer 1

Answer:

20

Step-by-step explanation:

X+Y=30

X-Y=10 ADD

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2X=40

X=40/2

X=20 ANS.

20+Y=30

Y=30-20

Y=10 ANS.

PROOF:

20-10=10

10=10

Answer 2

Answer:

x=20 and you=10

Step-by-step explanation:

x and you are 2 numbers

x+y=30 and x-y=10

add equation 1 and 2

so, x=20 and y=10