Wtfbae15 Wtfbae15
  • 18-02-2016
  • Mathematics
contestada

A number is 6 greater than 1/2 another number. If the sum of the numbers is 21,find the numbers.

Respuesta :

nobrains
nobrains nobrains
  • 18-02-2016
x = (1/2)y + 6
x + y = 21

Substitute (1/2)y + 6 as x into the equation x + y = 21 since x = (1/2)y + 6.
[(1/2)y + 6] + y = 21
0.5y + 6 + y = 21
1.5y = 15
y = 10

Same thing, now substitute 10 as y in the other equation.
x + y = 21
x + (10) = 21
x = 11

Answer Link

Otras preguntas

Find the value of:[tex] 27x^{3}+8 y^{3} [/tex] if 3x+2y = 20 and xy = [tex] \frac{14}{9} [/tex]
Two glasses together contain 280 mLof water. The first glass contains 80 ml more than the second glass. How much water does the first glass contain?
How does the modern era differ from the post-classical era?
4(X-1)-3(X^2+2X+3)-7(X+7)
compare the invention of the atlatl withthe invention of the bow and arrow, cannon, machine gun, and combat aircraft. discuss impacts of these in their times.
4(X-1)-3(X^2+2X+3)-7(X+7)
90 students went to the zoo three had a hot dog,soda and a Popsicle ;24 have a hot dog; five had a hot dog and soda; 33 had a soda ;10 had a soda and Popsicle;
solve for t d=(1/2) at^2
Need the values IN FRACTIONS (no mixed numbers or decimals)1. -1/2^12. -1/2^23. -1/2^34. -1/2^45. -1/2^5
solve for t d=(1/2) at^2