Simultaneous Equations <mtable displaystyle="true"> <mlabeledtr> <mtd id="mjx-eqn-1

Semaj Christian 2022-06-27 Answered
Simultaneous Equations
(1) 19 s + 12 t = 82
(2) 5 s + 4 t = 30
The point of the exercise is to find the values of t and s.
-So what I've done is label the first equation 1 and the second equation 2, as normal.
-Then I multiplied equation 2 by 3 to make the value of t the same on both equations and labelled this, new equation, equation 3:
(3) 15 s + 12 t = 90
-Then I took equation 3 from equation 2 to breaking it down to find the value of s.
(3) - (2)
4 s = 8
s = 2
-So, at this point I have worked out that s=2.
-The problem, for me, is when I substitute the value of s back into equation 1. the value of t is a recurring number of 6.
-Have i done something wrong?
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Answers (1)

pressacvt
Answered 2022-06-28 Author has 19 answers
4 s = 8
s = 2
Put value in equation (1) or (2)
t = 10

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