Question

The sum of two numbers is 12 and their difference is 4

write down two equations to describe given equation
solve the simultaneous equations to find the two numbers

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Answer 1

8 and 4

Explanation:

let the 2 numbers be a nd b

equations :

a + b = 12

a - b = 4

Adding the two equations

a + b + a - b = 12 + 4

2a= 16

a = 8

b = 4