It is quite simple. whenever the equation of a line is in the format y=mx+b, the slope is the value of m, in this case 35. The lack of the b or the y-intercept is because it equals 0, so it is not necessary to include a +0.
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35x + 115 = 360 35x = 360-115 35x = 245 x = 245/35 x = 7
42x+35x-35x=42x it's leave 85 so it's change into a negative 42x-85 is the answer
x equals 9
2
x2-35x+300 = 0 (x-15)(x-20) = 0 x = 15 or x = 20