y=-3X
the line would cross the y-axis at (0,0)
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rearrange: y = 3x - 3, which crosses the x-axis when y = 0, ie when x = 1
This is an equation of a straight line. There is no 'one solution' for x and y. The line will cross the y-axis at y = 6, and the slope is -3.
The starting point on the y-axis changes from -2 to 6.
The answer to the problem of 7-3x equals 34 is x equals -9.
The solution to this problem is x=5.