Câu hỏi của Phạm Khánh Linh

Question

Tìm x :

a, -32 - ( x-5 ) = 0

b, -2x + ( 5 - 9 ) = 0

c, 11 + 3 +( 15 - x ) = 16

Giang Thủy Tiên · Accepted Answer

a) $-32-\left(x-5\right)=0$

$-32-x+5=0$

$\Rightarrow-32-x=-5$

$\Rightarrow x=\left(-32\right)-\left(-5\right)$

$x=\left(-32\right)+5$

$\Rightarrow x=\left(-27\right)$

b) $-2x+\left(5-9\right)=0$

$-2x+5+9=0$

$-2x+14=0$

$\Rightarrow-2x=\left(-14\right)$

$\Rightarrow x=\dfrac{-14}{-2}=7$

c) $11+3+\left(15-x\right)=16$

$14+15+x=16$

$29+x=16$

$x=16-29$

$\Rightarrow x=\left(-13\right)$Câu trả lời: a) $-32-\left(x-5\right)=0$