mekasbooj
mekasbooj mekasbooj
  • 24-11-2019
  • Mathematics
contestada

a first plus twice a second number is one. twice the first number plus the second totals fourteen.​

Respuesta :

TaeKwonDoIsDead
TaeKwonDoIsDead TaeKwonDoIsDead
  • 30-11-2019

Answer:

First Number = 9

Second Number = -4

Step-by-step explanation:

Let the first number be "x" and the 2nd number be "y"

First number PLUS twice 2nd is 1, so we can write:

x + 2 y = 1

Twice First number PLUS the 2nd number is 14, so we can write:

2x + y = 14

We can write:

y = 14 - 2x

We put this into 1st equation and solve for x:

x + 2y = 1

x + 2(14 - 2x) = 1

x + 28 - 4x = 1

-3x = -27

x = 9

And now y:

y = 14 - 2(x)

y = 14 -2(9)

y = 14 - 18

y = -4

First Number = 9

Second Number = -4

Answer Link

Otras preguntas

60% of what number is 72?
The recommended dose of Vancocin® for a severe staphylococcal infection is 40 mg/kg/day.  The adult weighs 180 pounds and is to receive the medication IV q6h
how would I calculate the X from a known velocity when launching a ball off a table?
What work ends with the phrase, "Workers of all countries, unite!"?
After decaying for 48 hours, l/16 of the original mass of a radioisotope sample remains unchanged. What is the half-life of this radioisotope?
Who was Tchaikovsky? need help pls
A 1200 kg vehicle initially travelling at 50. km/h experiences an air resistance of 5000 N and road friction of 2200 N. The wheels deliver a force of 7500 N to
Multiply and simplify(5a + 2bc) (5a - 2bc)
find errors1) i'm not satisfied with (a) your explanation of where (b)  you was last night (c). no error (d)2) i came into  (a) the room when  (b) mary played t
(a-6b)(a+6b) pls answer