Question

Urgentt! Va rog!!
a) 44-{68-4*[150-6*(5*x-25):3] :10}:5=40.
b) 42-90: {[(36:x-4)*5-7]:2}=32
c) 96-{[(6*x+400):80+100]:2-50}:20=94
d) {240- [1800: (x+120:6) +42]}:9=20
Atatea sunt! va roooog

Answer 1

a) 44-{68-4*[150-6*(5*x-25):3] :10}:5=40
-{68-4*[150-30x+150):3] :10}:5=40-44
{68-4*[(300-30x):3] :10}:5=4
68-4*(100-10x):10=20
-4*(100-10x):10=20-68
-4*(10-x)=20-68
4*(10-x)=48
10-x=12
x=-2

b) 42-90: {[(36:x-4)*5-7]:2}=32
-90: {[(36:x-4)*5-7]:2}=32-42
90: {[(36:x-4)*5-7]:2}=10
 [(36:x-4)*5-7]:2=9
(36:x-4)*5-7=18
(36:x-4)*5=25
36:x-4=5
36:x=9
x=4

c) 96-{[(6*x+400):80+100]:2-50}:20=94
-{[(6*x+400):80+100]:2-50}:20=94-96
{[(6*x+400):80+100]:2-50}:20=2
[(6*x+400):80+100]:2-50=40
[(6*x+400):80+100]:2=90
(6*x+400):80+100=180
(6*x+400):80=80
6*x+400=6400
6*x=6000
x=1000

d) {240- [1800: (x+120:6) +42]}:9=20
240- [1800: (x+20) +42]=180
- [1800: (x+20) +42]=180-240
1800: (x+20) +42=60
1800: (x+20) =60-42
1800: (x+20) =18
 x+20 =100
x=80