grade 9 math slope equations
posted by rany on .
solve and comparison:
im so lost!!!!!
multiply the first by 3 to get
12x - 27y = 12 or 12x = 27y + 12
multiply the second by 2 to get
12x + 30y = -13 or 12x = -30y - 13
now "compare" the 12x of the first part with the 12x of the second part to get
27y + 12 = -30y - 13
"elimination" would be the more practical way of doing this one.
just subtract my two altered equations
why do you hav to multiply it by three though?
I wanted the x's to have the same coefficient.
4x .... and
think of finding a "common denominator"
and remember, what I do to one side of any equation, I must do to the other side.
thank u so much !!!!!!
i'm so dead!
Type the ordered pair that is the solution to these equations.3x - 2y = 8 2x + 5y = -1.