Question

resolva as equações (com cálculo por favor)​

Answer 1

Resposta:

OLÁ

VAMOS A SUA PERGUNTA:⇒⇒

A:=====>

$\sf m+2=3m-2$

$\sf m+2-3m=-2$

$\sf -2m+2=-2$

$\sf -2m=-2-2$

$\sf -2m=-4$

$\sf m=\dfrac{-4}{-2}$

$\boxed{\bold{\displaystyle{\clubsuit\ \spadesuit\ \maltese\ \sf \red{M=2} }}}\ \checkmark$← RESPOSTA.

B:=====>

$\sf -3x+7=-x$

$\sf -3x+7+x=0$

$\sf -2x+7=0$

$\sf -2x=-7$

$\sf x=\dfrac{-7}{-2} ==> simplificando ==> x= \dfrac{7}{2}$

$\boxed{\bold{\displaystyle{\clubsuit\ \spadesuit\ \maltese\ \sf \red{x= \dfrac{7}{2} =3\frac{1}{2}=3,5 }}}}\ \checkmark$← RESPOSTA.

C:====>

$\sf \dfrac{4k-3}{5}+ \dfrac{k+4}{3}=k+1$

$\sf 3(4k-3)+5(k+4)=15k+15$

$\sf 12k-9+5(k+4)=15k+15$

$\sf 12k-9+5k+20=15k+15$

$\sf 17k-9+20=15k+15$

$\sf 17k+11=15k+15$

$\sf 17k+11-15k=15$

$\sf 2k+11=15$

$\sf 2k=15-11$

$\sf 2k=4$

$\sf K=\dfrac{4}{2}$

$\boxed{\bold{\displaystyle{\clubsuit\ \spadesuit\ \maltese\ \sf \red{K=2}}}}\ \checkmark$← RESPOSTA.

Explicação passo-a-passo:

ESPERO TER AJUDADO