Resposta :

3478elc
x+2=5==> x = 3 
x-11=0==>x =11
4x=-8==> x = - 2
x-2=-1==>x = 1
6x=6==> x = 1
4x=3x+9==>x = 9
3x=7==>x=7/3
5x2+1=16==>5x^2=15==>x^2=3==> x=+/-V3
10x-2=7x==>3x=2==>x= 2/3
6x+5=6==>6x=1==>x=1/6
8x+4=0==>8x=-4==>x=-4/8

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