Question

p) [(20+452:4+a:4) X 7 - 25 x 80]: 3-66 + 125 x 8 = 100
q) 1000-[9x4 + 3x 6 x 3 - (a : 3 + 15)] : 3 = 976 VA ROG AJUTOR DAU COROANA SI TOATE PUNCTELE MELE VA ROG REPEDE, DAR CORECT​

Answer 1

Răspuns:

Explicație pas cu pas:

$\bf [(20+452:4+a:4)\cdot7-25\cdot80]:3-66+125\cdot8=1000$

$\bf [(20+452:4+a:4)\cdot7-25\cdot80]:3-66+1000=1000$

$\bf [(20+452:4+a:4)\cdot7-25\cdot80]:3-66=1000-1000$

$\bf [(20+452:4+a:4)\cdot7-25\cdot80]:3-66=0$

$\bf [(20+452:4+a:4)\cdot7-25\cdot80]:3=0+66$

$\bf [(20+452:4+a:4)\cdot7-25\cdot80]:3=66~~~\bigg|\cdot3$

$\bf [(20+425:4+a:4)\cdot7-25\cdot80]=198$

$\bf [(20+113+a:4)\cdot7-25\cdot80]=198$

$\bf (20+113+a:4)\cdot7-2000=198$

$\bf (20+113+a:4)\cdot7=198+2000$

$\bf (20+113+a:4)\cdot7=2198~~~\bigg|:7$

$\bf (20+113+a:4)=314$

$\bf 133+a:4=314$

$\bf a:4=314-133$

$\bf a:4=181$

$\bf a=181\cdot4$

$\red{\underline{\bf a=724}}$

==========pav38=============

$\bf 1000-[9\cdot4+3\cdot6\cdot3-(a:3+15)]:3=976$

$\bf [9\cdot4+3\cdot6\cdot3-(a:3+15)]:3=1000-976$

$\bf [9\cdot4+3\cdot6\cdot3-(a:3+15)]:3=24~~~\bigg|\cdot3$

$\bf 9\cdot4+3\cdot6\cdot3-(a:3+15)=72$

$\bf 36+54-(a:3+15)=72$

$\bf 90-(a:3+15)=72$

$\bf (a:3+15)=90-72$

$\bf a:3+15 = 18$

$\bf a:3 = 18-15$

$\bf a:3 = 3$

$\bf a = 3\cdot3$

$\green{\underline{\bf a = 9}}$

==========pav38========

Answer 2

Răspuns:

[(20+452:4+a:4)·7-25·80]:3-66+125·8=1000

[(20+113+a:4)·7-2000]:3-66+1000=1000

[(133+a:4)·7-2000]:3-66+1000=1000

[(133+a:4)·7-2000]:3-66=1000-1000

[(133+a:4)·7-2000]:3-66=0

[(133+a:4)·7-2000]:3=0+66

[(133+a:4)·7-2000]:3=66

(133+a:4)·7-2000=66·3

(133+a:4)·7-2000=198

(133+a:4)·7=198+2000

(133+a:4)·7=2198

133+a:4=2198:7

133+a:4=314

a:4=314-133

a:4=181

a=181·4

a=724

________

1000-[9·4+3·6·3-(a:3+15)]:3=976

[36+54-(a:3+15)]:3 = 1 000-976

[90-(a:3+15)]:3 = 24

90-(a:3+15)=24·3

90-(a:3+15)=72

a:3+15=90-72

a:3+15=18

a:3=18-15

a=3·3

a=9