Question

[3*(3*x+9)]÷13=9;1+{2*[3+(x-4)*5]÷6}*7=8 Va rog!!Rapid!!!

Answer 1

3*(3x+9)=117
3x+9=39
3x=30
x=10

2*[3+(x-4)÷6]=15/7
3+(x-4)÷6=15/14
3+(x-4)=45/7
x-4=24/7
x=52/7

Answer 2

1. y:13=9
y=9*13
y=117
3*(3x+9)=117
3*z=117
z=117:3=39
3x+9=39
3x=30
x=30:3=10

2. 1+y*7=8
1+7y=8
7y=8-1
7y=7
y=1
2*[3+(x-4)*5]:6=1
2z:6=1
2z=6*1
2z=6
z=6:2=3
3+(x-4)*5=3
3+5a=3
5a=3-3
5a=0
a=0:5
a=0
x-4=0
x=0+4
x=4