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The sum of two numbers is 15 and the difference is 4. Let the two numbers be x and y. Write down a pair of simultaneous equations involving x and y. Solve the equations.

The sum of two numbers is 15 and the difference is 4. Let the two numbers be x and y. Write down a pair of simultaneous equations involving x and y. Solve the equations.
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The sum of two numbers is 15 and the difference is 4. Let the two numbers be x and y.

Write down a pair of simultaneous equations involving x and y. Solve the equations.

asked
User Verystrongjoe
by
7.3k points

1 Answer

3 votes

Answer:

x=9.5 and y=5.5

Explanation:

x+y=15

x-y=4

add

2x=19

x=9.5

y=15-9.5

y=5.5

x=9.5 and y=5.5

answered
User Yanpas
by
8.1k points
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