makaylamccloulove makaylamccloulove

22-04-2021
Mathematics

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Find two numbers a and b whose sum a + b is 4 and whose difference a − b is 8 .

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retirEEd retirEEd

22-04-2021

Answer:

see below

Step-by-step explanation:

a + b = 4

a - b = 8 add the two equations to solve the system of equations

a + a + b + (- b) = 4 + 8

2a + 0b = 12

2a/2 = 12 /2

a = 6

a + b = 4

a - a + b = 4 -a

b = 4 - 6

b = -2

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