Thursday

August 21, 2014

August 21, 2014

Posted by **SAMMY** on Saturday, July 7, 2012 at 10:33pm.

a + b = 7

a + c = 12

b + c = 15

- MATH -
**Damon**, Sunday, July 8, 2012 at 12:20ama + b = 7

a + c = 12

----------------subtract

b - c = - 5

then

b - c = -5

b + c = 15

----------- add

2 b = 10

b = 5

you take it from there

- MATH -
**Chima**, Sunday, July 8, 2012 at 11:20amA+B=7, A=7-B---(1)

A+C=12,---(2), frm 1 substitute the value of A into eq 2 :7-B+C=12, C=12-7+B---(3)

also B+C=15---(4), also in the same way put C in eq3 into eq 4 ;B+12-7+B=15, B=5, now rem eq1 put B into it ;A=7-5=2 do the same thin 4 C by putin B in eq3 C=5

**Related Questions**

algebra - Solve the following system of equations for the unknown variables. x...

Alg 2 - Today we learned how to solve systems of equations with 3 variables, ...

math - How do you solve system of equations and tell if they're consistant and ...

Algebra 2 - 1.) Write a system of equations that has NO solution. 2.) If you ...

Algebra 2 - 1.) Write a system of equations that has NO solution. 2.) If you ...

Algebra 2 - 1.) Write a system of equations that has NO solution. 2.) If you ...

math - Solve following system of equations? x+3z=-2 2x+2y+z=4 3x+y-2z=5 i need ...

Discrete Math - I am really stuck on these problems. I've worked a lot of them ...

Algebra question - When you solve a system of equations by the substitution ...

Math 116 - Consider the following system of equations. y=2x-2 y-2x=9 What can ...