Question 1144178
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<pre>

Airplane + 40 gallons of fuel weights 2132 pounds.   (1)

Airplane + 15 gallons of fuel weights 1987 pounds.   (2)
----------------------------------------------------------Subtract (2) from (1). You will get

           25 gallons of fuel weight 2132 - 1987 = 145 pounds.  ====>

====>       1 gallon of fuel weights {{{145/25}}} = {{{29/5}}} = 5.8 pounds.


(Airplane + 50 gallons of fuel)'s weight = (Airplane + 40 gallons of fuel weight) +  (10 gallons of fuel weight) = 

                                            2132 + 10*5.8 = 2132 + 58 = 2190 pounds.


<U>Answer</U>.  Airplane with 50 gallons of fuel weights 2190 pounds.
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Compare it with the problem 5 of the lesson

&nbsp;&nbsp;&nbsp;&nbsp;- <A HREF=https://www.algebra.com/algebra/homework/coordinate/lessons/Solving-mentally-word-problems-on-two-equations-in-two-unknowns-NEW.lesson>Solving mentally word problems on two equations in two unknowns</A> 

in this site.


Same problem, different numbers.


And the same idea / methodology of the solution.