hogrefekelsey
hogrefekelsey hogrefekelsey
  • 04-04-2021
  • Mathematics
contestada

a first number plus twice a second number is 8 twice the first number plus the second totals 25

Respuesta :

barackodam barackodam
  • 04-04-2021

Answer:

The first number is 14

The second number is -3

Step-by-step explanation:

x + 2y = 8

2x + y = 25

Solving simultaneously,

2x + 4y = 16

2x + y = 25

On subtracting, we have

3y = -9

y = -3

Going to substitute for y, we have

x + 2(-3) = 8

x - 6 = 8

x = 14

Answer Link

Otras preguntas

What body of water is #4 pointing to? A) Lake Ontario B) lake Lanier C) lake Victoria D) Black Sea
Which statement is true of a catalyst? A. It behaves as a reactant in a chemical reaction. B. It increases the temperature of a reaction. C. It decreases the
Help please I really want to get this done
what were some things settlers hoped to find in the New World
What are the basic building blocks of DNA and RNA? A. nucleotides B. phosphorous C. proteins D. sugar
what is 4 times 1 1/2 times 2
Why is DNA evidence so reliable in determining identity
What is the value of 1 raised to the power of any exponent? What is the value of 0 raised to the power of any non-negative non-zero exponent? Complete the expla
Can someone help me on question 39 please!! Thank u!!
John is 24 years old. Two years ago, he was twice Shane's age at that time. How old is Shane now?