Question

I need help with my homework :p

Answer 1

The system of equations is 5x+4y=75 and x+y=18.

The first number is 3 and the second number is 15.

Step-by-step explanation:

Two numbers are x and y.

According to given statement;

5x+4y=75     Eqn 1

x+y=18          Eqn 2

Multiplying Eqn 2 by 5

$5(x+y=18)\\5x+5y=90\ \ \ Eqn\ 3$

Subtracting Eqn 1 from Eqn 3

$(5x+5y)-(5x+4y)=90-75\\5x+5y-5x+4y=15\\y=15$

Putting y=15 in Eqn 2

$x+15=18\\x=18-15\\x=3$

The system of equations is 5x+4y=75 and x+y=18.

The first number is 3 and the second number is 15.

Keywords: linear equation, elimination method

Learn more about elimination method at:

• brainly.com/question/1234767
• brainly.com/question/1238144

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