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What is the result of adding these two equations?

{:[-5x-9y=3],[5x-9y=-2]:}

What is the result of adding these two equations?\newline5x9yamp;=35x9yamp;=2 \begin{aligned} -5 x-9 y & =3 \\ 5 x-9 y & =-2 \end{aligned}

Full solution

Q. What is the result of adding these two equations?\newline5x9y=35x9y=2 \begin{aligned} -5 x-9 y & =3 \\ 5 x-9 y & =-2 \end{aligned}
  1. Identify operation to combine: Identify the operation to combine the equations. Since the coefficients of 'x' in both equations are opposite, we can add the equations to eliminate 'x'.
  2. Add equations to eliminate 'x': Add the equations to eliminate 'x'. (5x9y)+(5x9y)=3+(2)(-5x - 9y) + (5x - 9y) = 3 + (-2)\newline5x+5x9y9y=32-5x + 5x - 9y - 9y = 3 - 2\newlineThe x terms cancel each other out, and we are left with 18y=1-18y = 1.
  3. Simplify the equation: There is a mistake in the previous step. The correct calculation should be 5x+5x9y9y=32-5x + 5x - 9y - 9y = 3 - 2, which simplifies to 18y=1-18y = 1. However, the correct simplification is 18y=1-18y = 1.

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