Question

Resolva as equações de 1o grau.
a) 5x + 6 = - 4
b) 4x – 8 – 2x = x – 2
c) 10x – 8 – 2 = 7x – 4
d) 2 ( x + 1 ) – ( x – 1 ) = 0
e) 13 + 4 ( 2x – 1 ) = 5 ( x + 2 )

Answer 1

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$\tt a)~\sf 5x+6=-4\\\sf 5x=-4-6\\\sf 5x=-10\\\sf x=-\dfrac{10}{5}\\\huge\boxed{\boxed{\boxed{\boxed{\sf x=-2}}}}\blue{\checkmark}\\\tt b)~\sf 4x-8-2x=x-2\\\sf 4x-2x-x=-2+8\\\huge\boxed{\boxed{\boxed{\boxed{\sf x=6}}}}\blue{\checkmark}\\\tt c)~\sf10x-8-2=7x-4\\\sf 10x-7x=-4+8+2\\\sf 3x=6\\\sf x=\dfrac{6}{3}\\\huge\boxed{\boxed{\boxed{\boxed{\sf x=2}}}}\blue{\checkmark}$

$\tt d)~\sf 2\cdot(x+1)-(x-1)=0 \\\sf 2x+2-x+1=0\\\sf 2x-x=-2-1\\\huge\boxed{\boxed{\boxed{\boxed{\sf x=-3}}}}\blue{\checkmark}\\\tt e)~\sf 13+4\cdot(2x-1)=5\cdot(x+2)\\\sf 13+8x-4=5x+10\\\sf 8x-5x=10-13+4\\\sf 3x=1\\\huge\boxed{\boxed{\boxed{\boxed{\sf x=\dfrac{1}{3}}}}}\blue{\checkmark}$