hiitscailey
hiitscailey hiitscailey
  • 26-05-2017
  • Mathematics
contestada

7x+2y=-48, I have to solve for either x or y. Then, I have to solve -7x+y=60 for the remainding variable, someone help!

Respuesta :

srnicklaus srnicklaus
  • 26-05-2017
7x+2y=-48 subtract one the one equation from the other to cancel out a variable
-7x+y=60
________
3y=12        divide by 3
y=4            put in y for an equation

-7x + 4=60 subtract 4
-7x=56 divide by -7
x=-8

so, your answer is...x=-8 and y=4

Answer Link

Otras preguntas

Bryn's age is given by the expression 3g - 7, where g is her sister Gabriela's age. If Bryn is 17, how old is Gabriela?
which of the binomials below is a factor of this trinomial? x^2-13x+36 A. x+4 B. x-7 C. x^2+7 D. x-4
At a movie store, Erin pays a monthly fee and is charged for each movie she rents. The table shows the monthly cost when Erin rents different numbers of movies
Please help me with this question
Which sentence has a verb that is in the passive voice? In Iowa, George Washington Carver was given piano lessons by Mrs. Millholland, a gifted musician.
At a movie store, Erin pays a monthly fee and is charged for each movie she rents. The table shows the monthly cost when Erin rents different numbers of movies
What is the climate like in the middle latitudes of South America?
42/40 in simplest form
The population of a certain city in 1975 was 65,000. In 2000 the census determined that the population was 99,500. Assuming the exponential growth, estimate the
Vascular tissue in plants consists of