Question

What is the value of t in the solution to this systems of linear equations?

2s – 3t = –1
3s – 4t = 0

a)–5
b)3
c)-7/3
d)4

Answer 1

Multiply both sides of the 1st Eq by -3, and multiply the 2nd Eq by 2. Then add the Eqs.

-6s + 9t = 3
+6s - 8t = 0

t = 3.