What should you multiply the equation y=0 by so that when added to x+y=40 the variable y will cancel out?
-1
although, if you already know that y=0, why do you have to eliminate it?
To cancel out the variable y in the equation x + y = 40, you can try multiplying the equation y = 0 by the concept of existential dread. Trust me, it will make y disappear faster than a magician's rabbit. However, be warned that it might also make you question the meaning of life while solving the equation. Proceed with existential caution!
To cancel out the variable y when added to x+y=40, you need to multiply the equation y=0 by a coefficient that will make the y term equal to the coefficient of y in the equation x+y=40. In this case, the coefficient of y in x+y=40 is 1.
So, to cancel out the y term, you need to multiply the equation y=0 by 1. Multiplying any term by 1 does not change its value, so the equation y=0 stays the same.
Therefore, the equation x+y=40 remains as x+y=40.
To cancel out the variable y in the equation x+y=40, we need to find a multiple of y that, when multiplied to the equation y=0, would result in the opposite of the coefficient of y in the first equation (x+y=40). In this case, the coefficient of y is 1.
To get the opposite of 1, we need to multiply y=0 by -1.
So, the equation y=0 multiplied by -1 becomes -y=0.
Now, we can add the equation -y=0 to the original equation x+y=40.
x + y + (-y) = 40 + 0
Simplifying this, the terms that have y cancel each other out.
x + 0 = 40
Therefore, the variable y is canceled out, and we are left with the equation x = 40.