Question

1) vamos resolver as seguintes equaçoes de 1 grau com uma incognita, sendo U=Q.
a) 2x+7x-10=4x+3-2x
b) 3. (x+1) +8
c) 4. (x-6)=-3

Answer 1

Resposta:

Explicação passo a passo:

a.

$2x+7x-10=4x+3-2x\\2x+7x-10+10=4x+3-2x+10\\9x=4x+3-2x+10\\9x-4x=3+2x+10\\5x-2x=3+10\\3x=18\\\frac{3}{3} =\frac{18}{3} \\x=6$

b.

$3.(x+1)+8\\3x+1+8\\3x=9\\\frac{3}{3} =\frac{9}{3} \\x=3$

c.

$4.(x-6)=-3\\4x-24=-3\\4x-24+3\\4x=21\\\frac{4}{4}=\frac{21}{4} \\\x=5,25$