Sara G.

asked • 11/24/19

what is the result of subtracting the second equation from the first?

what is the result of subtracting the second equation from the first

-4x-2y=-2

x-2y=9


Julia R.

We have to remember when subtracting equations that we can only subtract like terms. This means that we can only subtract x from -4x, -2y from -2y and 9 from -2. If we do this, we obtain the equation -5x + 0=-11. This is because -4x-x=-5x. When subtracting a negative, we add the term so -2y- -2y becomes -2y + 2y, which cancels to 0. -2-9=-11. -11/-5 is 2.2, the value of x.
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11/25/19

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