a)3x+6-1=2x+6-7
b)3x+3+2=5+2x-2
c)5•(2x+7)-1=4•(x-5)+9
d)2•(x-1)+3•(x+1)=4•(x+2)
e)2•(2x+3)+5(x+1)=8-3(x-1)
f)13•(2x-3)-5•(2-x)=5•(-3+6x)
Respostas
Resposta:Segue as contas baixo na explicação
Explicação passo-a-passo:
a)3x+6-1=2x+6-7 b)3x+3+2=5+2x-2 c)5•(2x+7)-1=4•(x-5)+9
3x+5=2x-1 3x+5=2x+3 10x+35-1=4x-20+9
3x-2x=-1-5 3x-2x=3-5 10x+34=4x-11
x=-6 x=-2 10x-4x=-11-34
6x=-45
x=-45/6:3/3
x=-15/2
d)2•(x-1)+3•(x+1)=4•(x+2) e)2•(2x+3)+5(x+1)=8-3(x-1)
2x-2+3x+3=4x+8 4x+6+5x+5=8-3x+3
5x+1=4x+8 9x+11=11-3x
5x-4x=8-1 9x+3x=11-11
x=7 12x=0
x=0/12
x=0
f)13•(2x-3)-5•(2-x)=5•(-3+6x)
26x-39-10+5x=-15+30x
31x-49=-15+30x
31x-30x=-15+49
x=34