# algebra

posted by .

Solve the following system of equations for the unknown variables.
x + y = 12
x – y = –2
(NOTE: Show answer in the following format (#,#). If not entered in this format, will be scored incorrect.)

• algebra -

2x = 10
so x=5
plug back into the first: 5+y = 12 ----> y = 7

check in the 2nd equation.

## Similar Questions

1. ### Algebra 2

1.) Write a system of equations that has NO solution. 2.) If you wanted to eliminate the y variables in the system of equations below, what would you multiply the first and second equations by?
2. ### Discrete Math

I am really stuck on these problems. I've worked a lot of them but I can't get these. Sometimes I think I know the answer but I can't show how I got it. 1.) Solve each matrix equation for X. 2X + 5A = B 2.) Find the following matrices: …
3. ### Chem.

Using condensed electron configurations, give reactions showing the formation of the common ions of the following elements. (Type your answers in the following order. In the first box enter your answer using the format [Ar] 4s2 3d10 …

1.)Solve for y in the following system of equations. x + 4y = -38 -x - 6y = 58 My answer 1.) -10 2.) 6 3.) 12 4.) 10 2.)Solve for y in the following system of equations. x - 10y = -50 -4x + 6y = -4 1.) -6 2.)3 3.)-3 My answer4.)6
5. ### trig

Give the component form of the resultant vector in the following. NOTE: Answer must be typed in using the following format -- including the parentheses: (#,#). u =(10, 5) -3u=
6. ### math

Solve by setting up the proper equation to describe the facts given and then carrying out the mathematical calculations to solve for the unknown variable(s). Three batteries are connected in series so that the total voltage is 54 volts. …
7. ### MATH

Solve the following system of equations for the unknown variables. a + b = 7 a + c = 12 b + c = 15
8. ### Calculus

Please check my answers. Solve the following equations and/or system of equations for the unknown variables. 1. x^2-3x-12=0 x= 3 + sqrt(57) / 2, x= 3 - sqrt(57) / 2 2. x+y=8 , 3x+2y=2 x=-14, y=22 3. 3x + 2y =10 , x+y=5 , y+z =9 x=0,y=5, …
9. ### Python Programming

Given a time in the 12 hour format with the suffix, either AM/PM, convert that into a 24 hour format. 12 hour format is hours:minutes:seconds followed by AM or PM, where the hours range is from 0 to 12, minutes range is from 0 to 59, …
10. ### maths

2 . Put the following macroeconomic model into matrix format using Y, C and T as the variables and find the determinant of the matrix of coefficients. There is no need to solve the equations. Y = C + I C = a + b (Y – T) T = tY Kindly …

More Similar Questions