solving systems of equations by substitution y= -4/9x -3
y= -4/9x -3
-4/9x -3 =-7/5x-3
by looking at the problem you can see that you will end up with a number times x equal to zero. when you divide by that number to get x, you know that ant number divided by 0 is 0.
2. replace x with zero
y= -4/9(0) -3
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