Resolva as equações abaixo a] -4x=8 b] 3x+17=19 c] 2x-1=x-10 d] 4[2x-5]=3-[-2x+1] e] 4/5+x/2=x/3-1 f] x+3=2[x-1/2]
(1) Respostas
a] -4x=8 x = -8/4 x = -2 b] 3x+17=19 3x = 19 - 17 3x = 2 x = 2/3 c] 2x-1=x-10 2x-x = -10 + 1 x = -9 d] 4[2x-5]=3-[-2x+1] 8x - 20 = 3 + 2x -1 8x - 2x = 3 - 1 + 20 6x = 22 3x = 11 x = 11/3 e] 4/5+x/2=x/3-1 [latex]\frac{4}{5}+\frac{x}{2}=\frac{x}{3}-1\\ 24+15x=10x-30\\ 24x-10x=-30-24\\ 14x=-54\\ 7x=-27\\ x=-\frac{27}{7}[/latex] f] x+3=2[x-1/2] [latex]x+3=2(x-\frac{1}{2})\\ x+3=2x-1\\ x-2x=-1-3\\ -x=-4\\ x=4[/latex]
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