Question

120+5×[28-3×(2×-20)]=140​

Answer 1

Răspuns:

Explicație pas cu pas:

Answer 2

Explicație pas cu pas:

$\bf 120+5 \cdot\big[28-3 \big(2x-20 \big) \big]=140$

$\bf 5 \cdot\big[28-3 \big(2x-20 \big) \big]=140 - 120$

$\bf 5 \cdot\big[28-3 \big(2x-20 \big) \big]=20 \: \: \: \: \: \bigg| : 5$

$\bf 28-3 \cdot \big(2x-20 \big)=4$

$\bf 28 = 4 + 3 \cdot \big(2x-20 \big)$

$\bf 28 - 4 = 3 \cdot \big(2x-20 \big)$

$\bf 24 = 3 \cdot \big(2x-20 \big) \: \: \: \:\bigg| :3$

$\bf 8= 2x-20$

$\bf 8 + 20 =2x$

$\bf 28 =2x \:\: \: \: \bigg| :2$

$\bf 14 =x$

$\red{ \underline{ \: \bf x = 14 \: }}$