Question

Tìm x

(16x-30).8]+80}:5=224

Answer 1

\(\left[\left(16x-30\right)\cdot8+80\right]:5=224\\ \Rightarrow2\left(8x-15\right)\cdot8+80=1120\\ \Rightarrow16\left(8x-15\right)=1040\\ \Rightarrow8x+15=65\Rightarrow x=\dfrac{65-15}{8}=\dfrac{25}{4}=6,25\)

Answer 2

\(\dfrac{\left[\left(16x-30\right).8\right]+80}{5}=224\)

<=> \(\dfrac{\left(128x-240\right)+80}{5}=224\)

<=> \(\dfrac{128x-240+80}{5}=224\)

<=> \(\dfrac{128x-160}{5}=224\)

<=> 128x - 160 = 224 . 5

<=> 128x - 160 = 1120

<=> 128x = 1120 +160

<=> 128x = 1280

<=> x = 10

Answer 3

Làm hộ mik vs

15.37.4+120.21+21.5.12 ?