Addition Method
3a + 4c = -25
2a -3c =6
______________
3x-2y = 1
2x-3y = -6
___________
3a - 6y = 4
a - 2y = 4
Please explain to me how to do it and show me. Please!! I gotta understand this stuff!
2006-07-11 07:53:36 · 1 answers · asked by brittneyafoster 1 in Education & Reference ➔ Higher Education (University +)
For problem 2...i think i did it wrong. I got 13/18
2006-07-11 08:15:33 · update #1
3a +4c= -25....................1(multiply this equation by 3)
2a-3c= 6..........................2(multiplying this equation by 4)
equations reduces to this form
9a+12c= -75
8a - 12c = 24
...........................
17a= - 51
a= -51/17
a= -3 ,puttint this value of a in equation 2
2(-3)-3c= 6
-6 -3c=6
-3c= 6+6
-3c=12
c= 12/-3
c= -4
similarly try other questions.
2006-07-11 08:06:51 · answer #1 · answered by flori 4 · 0⤊ 0⤋