Tarrants156
Tarrants156
15-07-2014
Mathematics
contestada
Help please 2y-5x=-1, x=2y+5
Respuesta :
Аноним
Аноним
15-07-2014
[tex]\left\{\begin{array}{ccc}2y-5x=-1\\x=2y+5\end{array}\right\\\\substitute\\\\2y-5(2y+5)=-1\\2y-10y-25=-1\\-8y=-1+25\\-8y=24\ \ \ \ /:(-8)\\y=-3\\\\x=2\cdot(-3)+5=-6+5=-1\\\\Solution:x=-1;\ y=-3[/tex]
Answer Link
VER TODAS LAS RESPUESTAS ( 42+ )
Otras preguntas
The inner and outer Radii of a cylindrical pipe are 5 cm and 4 cm respectively. find the area of cross section of the pipe.
What all the multiples of 81?
What is 25% of $500.00? I think the answer is $475.00 Can someone verify if twenty five percent of 500.00 is $475.00
Does an owl have a backbone?
a lunch bill including tax, is divided among you and 5 friends. everyone pays less than $8.75. write and solve an inequality that describes the total amount of
The inner and outer Radii of a cylindrical pipe are 5 cm and 4 cm respectively. find the area of cross section of the pipe.
Does an owl have a backbone?
What were the contributions of the Harappan civilization?
What all the multiples of 81?
Thelma spent 1/6 of her weekly allowance on dog toys. 1/4 on a dog collar and 1/3 on dog food. What fraction of her weekly allowance is left
