Question

Solve for r, s, and t
6r-s+t=31
4r+2-3t=34
r-3s+2t=-9

Answer 1

6r-s+t=31
solve for t in this first one:
add -6r +s to both sides to get:
t= 31-6r +s

insert 31-6r +s in place of t to solve for another variable
place that value in to get exact value of last variable, substitute and find exact valur of remaining.

Answer 2

thanks