Câu hỏi của Lê Bảo Hân

Question

80 - 7(x - 7) = 95 - 32 . 6

Nguyễn Đức Trí · Accepted Answer

$80-7\left(x-7\right)=95-3^2.6$

$\Rightarrow80-7\left(x-7\right)=95-54$

$\Rightarrow80-7\left(x-7\right)=41$

$\Rightarrow7\left(x-7\right)=80-41$

$\Rightarrow7\left(x-7\right)=39$

$\Rightarrow x-7=\dfrac{39}{7}$

$\Rightarrow x=\dfrac{39}{7}+7$

$\Rightarrow x=\dfrac{39}{7}+\dfrac{49}{7}$

$\Rightarrow x=\dfrac{88}{7}$Câu trả lời: $80-7\left(x-7\right)=95-3^2.6$

$\Rightarrow80-7\left(x-7\right)=95-54$

$\Rightarrow80-7\left(x-7\right)=41$

$\Rightarrow7\left(x-7\right)=80-41$

$\Rightarrow7\left(x-7\right)=39$

$\Rightarrow x-7=\dfrac{39}{7}$

$\Rightarrow x=\dfrac{39}{7}+7$

$\Rightarrow x=\dfrac{39}{7}+\dfrac{49}{7}$

$\Rightarrow x=\dfrac{88}{7}$

Nguyễn Nhân Dương · Answer

$80-7\left(x-7\right)=95-3^2.6$

$80-7\left(x-7\right)=95-9.6$

$80-7\left(x-7\right)=95-54$

$80-7\left(x-7\right)=41$

$7\left(x-7\right)=80-41$

$7\left(x-7\right)=49$

$x-7=49:7$

$x-7=7$

$x=7+7$

$\Rightarrow x=14$Câu trả lời: $80-7\left(x-7\right)=95-3^2.6$