Asked by wendy
how do you solve c=3d-27 ; 4d+10c=120
Answers
Answered by
jai
(1) c = 3d - 27
(2) 4d + 10c = 120
there are several ways to solve this problem (system of linear equations),, but in this case, we substitution method since in equation (1), variable c is expressed in terms of the other variable d,, we then substitute c from equation (1) to equation (2):
4d + 10(3d-27) = 120
4d + 30d - 270 = 120
34d = 390
d = 195/17
*substituting this value of d to either equations (in this case, to (1)):
c = 3d - 27
c = 3(195/17) - 27
c = 585/17 - 27
c = (585 - 459)/17
c = 126/17
so there,, :)
(2) 4d + 10c = 120
there are several ways to solve this problem (system of linear equations),, but in this case, we substitution method since in equation (1), variable c is expressed in terms of the other variable d,, we then substitute c from equation (1) to equation (2):
4d + 10(3d-27) = 120
4d + 30d - 270 = 120
34d = 390
d = 195/17
*substituting this value of d to either equations (in this case, to (1)):
c = 3d - 27
c = 3(195/17) - 27
c = 585/17 - 27
c = (585 - 459)/17
c = 126/17
so there,, :)
Answered by
Chelsea
How do you solve this problem? V = Bh
Solve each formula for the variable shown in RED. In this problem the variable in RED is the letter B.
Solve each formula for the variable shown in RED. In this problem the variable in RED is the letter B.
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