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x in (-oo:+oo)
-(4*x)-7 = -47 // + 47
47-(4*x)-7 = 0
47-4*x-7 = 0
40-4*x = 0 // - 40
-4*x = -40 // : -4
x = -40/(-4)
x = 10
x = 10
| 3w+8=29 | | 3m+1=31 | | 3+6w=-9 | | 4+4w=24 | | 5+2w=17 | | 4a-9=31 | | -5-2w=-3 | | 10+5t=65 | | -104=6x-3/2x^2 | | 10m+3n-2m+5m-12-14m+5n= | | -5b+9=-31 | | 5t+1=56 | | 4a+3=-41 | | 9+6k=15 | | -5+6k=61 | | 5x^2+46x+53=5 | | 5t+8=28 | | 6+2m=-14 | | 10+2a=22 | | 3x(x+3)=8 | | 6+2k=28 | | -3a-6=-18 | | -5w+9=-16 | | 10+5n=10 | | -4x^2-22x+31=0 | | .2x^2+3.7x-1.9=0 | | 5x^2+46+53=5 | | 2k-3=-15 | | -10+4k=30 | | 5+4k=41 | | 4t+10=42 | | 6+5a=31 |