first solve for y:
*you can actually rewrite this as:
0x + y = 7
notice the equation has a definite value of y (which is 7) while you can substitute any number on x (since when it is multiplied by zero, the product is always zero),, y is therefore independent on the value of x,,
therefore, the graph of y=7 is a horizontal line passing through the y-axis at point (0,7), and will never pass at the x-axis,,
so there,, =)
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