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anonymous
 5 years ago
the objective is to solve systems of equations by the addition method (no multiplying required) problem: x + y = 5 3x  y = 7
anonymous
 5 years ago
the objective is to solve systems of equations by the addition method (no multiplying required) problem: x + y = 5 3x  y = 7

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anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0Just add the two equations and you get 4x = 12, so x = 3. Now plug this in, into either of the equations and you get y = 2.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0How would I show my work to this problem?

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0x + y = 5 3x  y = 7  4x = 12 x = 12/4 = 3 substituting x = 3 in x + y = 5, you get 3 + y = 5, or y = 5  3 = 2.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0\[ x + y = 5 \ (1)\] \[ 3x  y = 7 \ (2)\] \[ (1)\ +\ (2) \implies 4x = 12 \implies x = 3\] I always solve simultanz by labelling the equations, but I'm cultured.
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