Question

repede im trebuie acum ex 20 plz dau coroana!!!! si puncre maxime!!!

Answer 1

a) (x+90)*5+700=600*2
5x+450=1200-700
5x=500-450
x=50:5
x=10

b) 3(3x+7)+9=3*16
9x+21=48-9
9x=39-21
x=18:9
x=2

c) (15+75:x)*13+500=38*20
(15+75:x)*13=760-500
(15+75:x)=260:13
75:x=20-15
x=75:5
x=15

d) 6x+4-22=5x+5+78
6x-5x=5+78-4+22
x=101

e) (10x+15+8x+12):5=27
18x+27=27*5
18x=135-27
x=108:18
x=6

f)2{27-2[3x-(7-6)]+3}:4=10
[27-2(3x-1)+3]=10:2*4
27-6x+2+3=20
-6x=20-32
-6x=-12(-1)
x=12:2
x=2

Answer 2

a) [(x+360:4)*5+700]:600=2
[(x+90)*5+700]=2x600=1200
(x+90)*5=1200-700=500
(x+90)=500:5
x+90=100
x=100-90
x=10
b) [3*(3x+7)+9]:16=3
[3*(3x+7)+9]=3x16=48
9x+21=48-9
9x+21=39
9x=39-21
9x=18
x=18:9
x=2
c) [(15+75:x)*13+500]:20=38
[(15+75:x)*13+500]=38x20=760
(15+75:x)*13=760-500=260
(15+75:x)=260:13
15+75:x=20
75:x=20-15
75:x=5
x=75:5
x=15
d) 2*(3x+2)-22=5*(x+1)+78
 6x+4-22=5x+5+78
 6x+4-22=5x+83
 6x-5x=83+22-4
 x=101
e) [5*(2*x+3)+4*(2*x+3)]:5=27
[10x+15+8x+12]=27x5=135
18x+27=135
18x=135-27
18x=108
x=108:18
x=6
f) 2*{27-2*[3*x-(35:5-2*3)]+3}:4=10
2*{27-2*[3*x-(7-6)]+3}=10*4=40
{27-2*[3*x-1]+3}=40:2=20
27-2*[3*x-1]=20-3=17
2*[3*x-1]=27-17=10
[3*x-1]=10:2
3*x-1=5
3*x=5+1
3*x=6
x=6:3
x=2