Toán a) 170-2.(5-x)=59 b)170-2.(5-x)=50 giúp mình vs ạ 28/11/2021 By Everleigh a) 170-2.(5-x)=59 b)170-2.(5-x)=50 giúp mình vs ạ
a) $170$ – $2$ . $(5-x)$ = $59$ $=>$ $2$ . $(5-x)$ = $170$ – $59$ $=>$ $2$ . $(5-x)$ = $111$ $=>$ $(5-x)$ = $111$ : $2$ $=>$ $(5-x)$ = $55,5$ $=>$ $x$ = $55,5$ – $5$ $=>$ $x$ = $50,5$ Vậy $x$ = $50,5$ b) $170$ – $2$ . $(5-x)$ = $50$ $=>$ $2$ . $(5-x)$ = $170$ – $50$ $=>$ $2$ . $(5-x)$ = $120$ $=>$ $(5-x)$ = $120$ : $2$ $=>$ $(5-x)$ = $60$ $=>$ $x$ = $60$ – $5$ $=>$ $x$ = $55$ Vậy $x$ = $55$ Trả lời
Đáp án: a, $x=-\dfrac{101}{2}$ b, $x=-55$ Giải thích các bước giải: a, $170-2(5-x)=59$ $\to 2(5-x)=170-59$ $\to 2(5-x)=111$ $\to 5-x=\dfrac{111}{2}$ $\to x=5-\dfrac{111}{2}$ $\to x=-\dfrac{101}{2}$ b, $170-2(5-x)=50$ $\to 2(5-x)=170-50$ $\to 2(5-x)=120$ $\to 5-x=60$ $\to x=-55$ Trả lời
a) $170$ – $2$ . $(5-x)$ = $59$
$=>$ $2$ . $(5-x)$ = $170$ – $59$
$=>$ $2$ . $(5-x)$ = $111$
$=>$ $(5-x)$ = $111$ : $2$
$=>$ $(5-x)$ = $55,5$
$=>$ $x$ = $55,5$ – $5$
$=>$ $x$ = $50,5$
Vậy $x$ = $50,5$
b) $170$ – $2$ . $(5-x)$ = $50$
$=>$ $2$ . $(5-x)$ = $170$ – $50$
$=>$ $2$ . $(5-x)$ = $120$
$=>$ $(5-x)$ = $120$ : $2$
$=>$ $(5-x)$ = $60$
$=>$ $x$ = $60$ – $5$
$=>$ $x$ = $55$
Vậy $x$ = $55$
Đáp án:
a, $x=-\dfrac{101}{2}$
b, $x=-55$
Giải thích các bước giải:
a,
$170-2(5-x)=59$
$\to 2(5-x)=170-59$
$\to 2(5-x)=111$
$\to 5-x=\dfrac{111}{2}$
$\to x=5-\dfrac{111}{2}$
$\to x=-\dfrac{101}{2}$
b,
$170-2(5-x)=50$
$\to 2(5-x)=170-50$
$\to 2(5-x)=120$
$\to 5-x=60$
$\to x=-55$