Respuesta :
Answer: -4x-2y-x+2y=-5x=-11
Step-by-step explanation:
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.
The result after subtracting the following equation is x= -8/5.
What is a system of equations?
A system of equations is two or more equations that can be solved to get a unique solution. the power of the equation must be in one degree.
Given system of equation;
-20 + 7y = 10
3x + 7y = 2
When subtracting equations that we have to subtract like terms.
-2x+7y=10 ----- eq(1) ,
3x + 7y =2------ eq(2)
7y + 3x =2
7y - 2x = 10
By subtracting eq 2 from eq 1 we get,
5x = -8
x= -8/5
Learn more about equations here;
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