An engineer

An engineer and five technicians on an oil rig earn $14208 per month, while three engineers and nine technicians earn $28800 per month. Find how much an engineer earns and how much a technician earns per month.

Correct answer:

e =  2688
t =  2304

Step-by-step explanation:


e+5t = 14208
3e+9t = 28800

e+5·t = 14208
3·e+9·t = 28800

e+5t = 14208
3e+9t = 28800

Pivot: Row 1 ↔ Row 2
3e+9t = 28800
e+5t = 14208

Row 2 - 1/3 · Row 1 → Row 2
3e+9t = 28800
2t = 4608


t = 4608/2 = 2304
e = 28800-9t/3 = 28800-9 · 2304/3 = 2688

e = 2688
t = 2304

Our linear equations calculator calculates it.



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