04-04-2014
Mathematics

contestada

If 2x+z=2y and 2x+2y+z=20 what is the value of y?

Respuesta :

Аноним Аноним

05-04-2014

[tex]2x+z=2y\to2x=2y-z\\\\substitute\ to\ 2x+2y+z=20:\\\\(2y-z)+2y+z=20\\2y-z+2y+z=20\\4y=20\ \ \ \ /:4\\y=5\to answer[/tex]

Answer Link

Otras preguntas

72 = 2³ x 3² 150 = 2 × 3 × 5² Work out the lowest common multiple of 72 and 150, giving your answer in prime factor form.

Identify the expression that can be used to solve 335 ÷ 5 = ___. (200 ÷ 5) + (35 ÷ 5) (250 ÷ 5) + (35 ÷ 5) (300 ÷ 5) + (35 ÷ 5) (350 ÷ 5) + (35 ÷ 5)

round 163 to the nearest 10? round it to the nearest ten it would be 160 i think because 163 is close to 160 so it has to 160

This image reflects the situation in the Midwest during the early 20th Century, a situation known as A) Dirty Farming B) Deforestation C) Dry Farming D) The Dus

If you have the two functions as shown, int someFunction(int value); float someFunction(float value); and a variable x, which is a double, which function is cal

A cla ha 12 boy and 18 girl. The cla a a whole ha a GPA (grade point average) of 2. 88, and the boy have a GPA of 2. 52. What i the GPA of the girl? (Round your

Where should you look in order to find words as they are used in a variety of contexts? a. Glossary c. Appendix b. Index d. Table of contents please select the

The constant use of variety is enough to sustain a listener's interest and make a music piece pleasing and memorable.t/f

For every 8 package Chelea wrap he ue 1/2 of a roll of wrapping paper. If he ue 3 1/2 roll of wrapping paper, how many package ha he wrapped

What historically has been the driving force behind the expanding responsibilities of the federal government?.