th3lastsh3riff th3lastsh3riff

14-11-2018
Mathematics

contestada

2x + 5y= 18 4x + 20y= -36 Solve and Explain first to get right gets brainliest

Respuesta :

wghitustl wghitustl

14-11-2018

because 4x+20y=-36,so ( 4x+20y)/2=2x+10y=-18

(2x+10y)-(2x+5y)=-18-18

5y=-36

then y=-7.2

because 2x=18-5y

so x=(18-5y)/2=(18-5*(-7.2)）/2=27

Answer Link

Otras preguntas

Water is boiled in a flask with a balloon over the top of the water gets the balloon expand what has happened to the weight of the Laskin balloon in this experi

please I really need your help!

Lewis structure for carbon tetrabromide (CBrÁ), in which a central carbon atom is bound to four atoms of the group 7A element bromine?

Solve the equation. –3x + 1 + 10x = x + 4

What is m-3x=2x+p?Solve for x.

what statement makes the open sentence 49 – 7x = 21 true? x = 11 x = 7 x = 4 x = 3

Whats the inverse of f(x)= 3x+7

how many solutions will the following equation have? 25=20x-4x^2

The principal male sex hormone is A. FSH. B. testosterone. C. estrogen. D. insulin.

If the United States falls into a recession, which action would the Federal Reserve take to encourage employment? A. Buy government securities B. Increase reser