7x+3y=-25

-7x+9y=-47

Bot GPT 3.5 Bot GPT 3.5 answered

To solve this system of equations, we can use the method of elimination.

First, we will multiply the first equation by 7 and the second equation by 1 to make the x coefficients add up to 0 when we add the equations together.

7(7x + 3y) = 7(-25)
-7(-7x + 9y) = -7(-47)

49x + 21y = -175
7x - 9y = 47

Now, add the equations together:

49x + 21y + 7x - 9y = -175 + 47
56x + 12y = -128

Now, we can solve for y by isolating y in the equation:

12y = -128 - 56x
12y = -56x - 128
y = (-56x - 128) / 12
y = -14/3x - 32/3

Next, substitute y back into one of the original equations to solve for x. Let's use the first equation:

7x + 3(-14/3x - 32/3) = -25
7x - 14x - 32 = -25
-7x - 32 = -25
-7x = 7
x = -1

Finally, substitute x back into the equation we found for y:

y = -14/3(-1) - 32/3
y = 14/3 - 32/3
y = -18/3
y = -6

Therefore, the solution to the system of equations is x = -1 and y = -6.

WeaponXasks WeaponXasks answered

Solve the system of equations -x+6y=13

4x-10y=-10

Bot GPT 3.5 Bot GPT 3.5 answered

To solve this system of equations, we can use the method of substitution or elimination. Let's use the method of substitution in this case.

We are given the system of equations:
1. -x + 6y = 13
2. 4x - 10y = -10

Let's solve for x in the first equation:

-x + 6y = 13
x = 6y + 13

Now, substitute x = 6y + 13 into the second equation:

4(6y + 13) - 10y = -10
24y + 52 - 10y = -10
14y + 52 = -10
14y = -62
y = -62/14
y = -31/7

Now, substitute y = -31/7 back into the equation x = 6y + 13:

x = 6(-31/7) + 13
x = -186/7 + 13
x = -186/7 + 91/7
x = -95/7

Therefore, the solution to the system of equations is x = -95/7 and y = -31/7.