Mathematics, 14.07.2020 19:01, musicqueen360
Caprice adds equations A and B to solve this system of equations. What makes this
approach a valid method in general for solving a system of equations?
Equation A:
Equation B:
8x + 3y = 27
4x - 3y = 9
12x = 36
CLEAR
CHECK
The method will give the correct solution, x = 3 and y = 1
8(3) + 3(1) - 27
4(3)-3(1) = 9
As long as addition used on both sides or subtraction is
used on both sides, a true equation will remain true.
Because the y-terms cancel:
(8x + 3y) + (4x - 3y) - 8x + 4x + 3y - 3y = 12x
Adding a quantity like 8x + 3y to one side of an equation
and another quantity like 27 to the other side maintains
the equality if the two quantities are equal.
Answers: 1
Mathematics, 21.06.2019 18:30, 25jzaldivar
Players on the school soccer team are selling candles to raise money for an upcoming trip. each player has 24 candles to sell. if a player sells 4 candles a profit of$30 is made. if he sells 12 candles a profit of $70 is made
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Mathematics, 21.06.2019 20:00, jacobbrandon2002
What sums are equal to 6/12? choose all answers that are correct a.6/12+6/12+6/12+6/12+6/12+6/12 b.2/12+1/12+1/12+2/12 c.5/12+1/12 d.1/12+1/12+1/12+3/12 plz : )
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Caprice adds equations A and B to solve this system of equations. What makes this
approach a valid...
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