A)17+x/5(4-x)+5x+1/5(x-4)
17+x/5*(-(x-4))+5x+1/5(x-4)-17+x/5(x-4)+5x+1/5(x-4)
-(17=x)+5x+1/5(x-4)
-17-x+5x+1/5(x-4)
-16+4x/5(x-4)
4x-16/5(x-4)
4(x-4)/5(x-4)
4/5
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1) x^2 - x = 0
x • (x - 1) = 0
x = 0
x - 1 = 0
x1 = 0
x2 = 1
2) 49^4 - 49^3 = (49 - 1) • 49^3 = 48 • 49^3