![cheergirl2133](/avatars/27705.jpg)
cheergirl2133
08.12.2019 •
Mathematics
Solving systems by substitution:
3x+y=2
4x+y=20
i don't understand how to solve it
Solved
Show answers
More tips
- H Health and Medicine Why Wearing a Back Brace Can Be Beneficial During Back Strain?...
- S Sport When and Where Will the 2014 World Cup be Held?...
- C Computers and Internet How to Choose a Monitor?...
- S Style and Beauty How to Get Rid of Peeling Nails: Natural Remedies...
- S Science and Technology Understanding Magnetic Storms: A Guide to This Natural Phenomenon...
- F Family and Home What is Most Important in Men s Lives?...
- G Goods and services Which TV is better - LCD or Plasma?...
- C Computers and Internet Are there special gaming mice?...
- G Goods and services LED-подсветка в LCD-телевизорах: 5 причин, почему она лучше других технологий...
- C Computers and Internet Keep Your Mouse Pad Clean: The Right Way to Clean It?...
Answers on questions: Mathematics
- M Mathematics Jenna eats dinner at a restaurant. her bill is $14.50 jenna pays her bill and leaves a tip. write an inequality to represent the total cost of jenna’s dinner...
- M Mathematics Will award 30 points and will mark the coordinate plane below represents a town. points a through f are farms in the town. part a: using the graph above, create a system of inequalities...
- M Mathematics Given that curl f = 2yi – 2zj + 3k, find the surface integral of the normal component of curl f (not f) over (a) the open hemispherical surface x2 + y2 + z2 = 9, z 0. (b) the sphere...
- H History Legislators get involved with casework for all of the following reasons except...
- M Mathematics Use the infinite geometric sum formula to write 0. as a fraction in reduced form. show all steps. i m so confused on how to do this and would really appreciate some !...
- S Social Studies 4. ¿Habías considerado los diferentes factores que son importantes para decidir qué carrera estudiar? ¿Qué otros factores considerarías para elegir?...
Ответ:
3X + Y = 2
Subract 3X
Y = -3X+2
Same with the other equation
4X+Y=20
Subract 4X
Y = 20-4X
Set the equations to each other and then solve
20-4X= -3X+2
Add 4X
20=X+2
Subract 2
X = 18
And now plug in 18 to one of the equations
3(18)+Y = 2
54 + Y = 2
Subract 54 on both sides
and the answer is -52
(18,52) is the answer
Ответ:
3x+y=2
-3x. -3x
y=-3×+2
second.
4x+y=20
-4x. -4x
y=-4x+20
-3x+2=-4x+20
+3x. +3x
2=-x+20
-20. -20
-18= -x
__ ___
-1. -1
18=x
Then you would go back to the original equation and substitute 18 for X
Ответ:
a and c
Explanation: i took a guess but let me know if i'm correct.