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1 vote
Use elimination to solve the system of equations. 12x+13y=-1 -12x+23y=10

2 Answers

6 votes

Answer:

x=-
(17)/(48), y=
(1)/(4)

Explanation:

Add the two equations, we get

(12x+13y)+(-12x+23y)=(-1)+10

12x+13y-12x+23y=9

36y=9

y=9/36=
(1)/(4)

12x+13x
(1)/(4)=-1

12x=-1-
(13)/(4)

x=(-
(17)/(4))÷12=-
(17)/(48)

User Dhruv Chandhok
by
7.1k points
4 votes

Answer: x = -17/48 and y = 1/4.

Explanation:

Solve the system of equations using elimination, we need to eliminate one of the variables (either x or y) by adding or subtracting the two equations.
Let's eliminate x:

12x + 13y = -1

-12x + 23y = 10


Adding the two equations, we get:

36y = 9


Dividing both sides by 36, we get:

y = 1/4

Now we can substitute this value of y into either of the original equations to find the value of x. Let's use the first equation:

12x + 13y = -1

12x + 13(1/4) = -1


Multiplying both sides by 4 to eliminate the fraction, we get:

48x + 13 = -4


Subtracting 13 from both sides, we get:

48x = -17

Dividing both sides by 48, we get:

x = -17/48

Therefore, the solution to the system of equations is:

x = -17/48 and y = 1/4.

User Pranavk
by
6.6k points