Question

Află valoarea fiecărei litere:- (138x 5-21:7-300 x 2) -9x9-r 2 =2​

Answer 1

bună⚘

꧁rezolvare꧂

(138•5-21:7-300•2)-9•9-r=2

(690-3-600)-81-2r=2

87-81-2r=2

6-2r=2

-2r = 2-6

= -4

r = -4:(-2)

= 4:2

= 2

-ˋˏ ༻bazilalina777muta༺ ˎˊ-

Answer 2

Explicație pas cu pas:

$\bf(138 \cdot 5-21:7-300 \cdot 2) -9 \cdot9-r=2$

$\bf(690-21:7-300 \cdot 2) -9 \cdot9-r=2$

$\bf(690-3-300 \cdot 2) -9 \cdot9-r=2$

$\bf(690-3-600) -9 \cdot9-r=2$

$\bf(687-600) -9 \cdot9-r=2$

$\bf87 -9 \cdot9-r=2$

$\bf87 -81-r=2$

$\bf6-r=2$

$\bf6=2 + r$

$\bf6 - 2 = r$

$\bf4=r$

$\bf \red{ \underline{r = 4}}$