If 6s-2t=10 and s-5t=14, what is the value of 5s+3t?

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If 6s-2t=10 and s-5t=14, what is the value of 5s+3t?

2007-05-17 14:45:25 · 2 answers · asked by adam a 1 in Science & Mathematics ➔ Mathematics

2 answers

first line up the two equations
6s-2t=10
1s-5t=14

we notice that 6s-1s will result in 5s
in order to subtract the two equations we must multiply the bottom equation by -1 then add them

6s-2t=10
+
-s+5t=-14
---------------
5s+3t=-4
thus the answer is -4

2007-05-17 14:50:48 · answer #1 · answered by Anonymous · 0⤊ 0⤋

6s - 2t = 10
s - 5t = 14

Subtracting gives:-
5s + 3t = - 4

2007-05-17 19:36:02 · answer #2 · answered by Como 7 · 0⤊ 0⤋