Question

resolva as equaçoes A 2x+1=6-3x B 3(x+2)=x C 2(x-1)=4(x-2)

Answer 1

Explicação passo-a-passo:

a)

$\sf 2x+1=6-3x$

$\sf 2x+3x=6-1$

$\sf 5x=5$

$\sf x=\dfrac{5}{5}$

$\sf x=1$

b)

$\sf 3\cdot(x+2)=x$

$\sf 3x+6=x$

$\sf 3x-x=-6$

$\sf 2x=-6$

$\sf x=\dfrac{-6}{2}$

$\sf x=-3$

c)

$\sf 2\cdot(x-1)=4\cdot(x-2)$

$\sf 2x-2=4x-8$

$\sf 2x-4x=-8+2$

$\sf -2x=-6~~~~\cdot(-1)$

$\sf 2x=6$

$\sf x=\dfrac{6}{2}$

$\sf x=3$