23-11-2016
Mathematics

contestada

find x+y,if12x+13y=29and 13x+12y=21

Respuesta :

23-11-2016

if 12x+13y=29 and 13x+12y=21

you sum up both equations:
(12+13)x+(12+13)y=29+21
25x+25y=50
25(x+y)=50
x+y=50/25
x+y=2

Answer Link

Otras preguntas

NEED HELP ASAP ILL MARK BRAINLIEST

Somebody help me with algebra? Please? x

What is the equation for kinetic energy?

si el divisor es 9 el cociente es 35 y el residuo 4 ¿ cuál es el dividendo?ayudaaa plis es para hoooy

A brownie recipe calls for 1 cup of sugar and LaTeX: \frac{1}{2}1 2 cup of flour to make one batch of brownies. To make multiple batches, the equation LaTeX: f=

Early astronomers noticed that some stars in the sky appeared to move together across the sky as constellations. How do astronomers today explain this motion? T

Read the text, then answer the question that follows: Wild animals as viewed from a mountain camp—Camille Grant, October 2011 Through my binoculars, I viewed a

3/10 X 7 in simplest form

If ATLY ~ ACHK, find the value of x. C T 10 25 H K x + 5 L' 4x - 1 Y

Divergent book What is the final fear Tris must face in her initiation? a moths b. ravens C. intimacy d. knives