Aa22 Aa22
  • 24-05-2017
  • Mathematics
contestada

Solve by substitution (show steps) -3x-4y=10 -6x+y=-16

Respuesta :

mreijepatmat
mreijepatmat mreijepatmat
  • 24-05-2017
1) -3x-4y=10 ==> - 3x = 10+4y  ===> 3x= -10-4y==> x=(-10-4y)/3
Now replace x by its value in 2)

2) -6x+y=-16 ==> - 6[( - 10- 4y)/3] + y = -16 ==> -2[(-10-4y] +y =- 16
+20+8y+y =- 16==> 9y = - 16 - 20 ==> 9y = -36 & y = - 4.

Now replace y by (- 4) in any of the 2 equations & you will find x = 2

Answer Link

Otras preguntas

what is |10 + (-6) | ?
Sheri's freezer is I 2 feet wide , 6 feet long, and 2 feet deep. What's the volume of her freezer?
What Is Life and What Is Its Purpose ?
Name the states which fell under Assyrian rule at its peak of power.
help me someone have to havr this done by monday 20 points The earth makes a full rotation in 24 hours. Jupiter takes approximately 58 days, 15 h, and 30 min to
please need help. ASAP
Please help me answer the first question! It would help me out a lot!!!!
What is the importance of using the correct tone in your argument? A. It can offer your audience new facts and information. B. It can offer your audien
Men and women of different age groups who have cancer are randomly assigned to groups differing in the dose of a new cancer-fighting drug in order to examine th
how to graph 5x-3y=44