Solving equation 20% x + (20% X-5) = 35

Solving equation 20% x + (20% X-5) = 35

20%x+(20%X-5)=35
0.2x+(0.2x-5)=35
0.4x-5=35
0.4x=40
x=40/0.4
=100

Solution equation: 65% + 35% (x-1) = 50% × 20%

To solve the equation:
65%+35%（x-1）=50%×20%
0.65+0.35x-0.35=0.1
0.35x=-0.2
x=-0.2/0.35=-4/7

Solution equation (x-120) / 70 = (x-120) / 90
Help me~~~~

(x-120)/70=(x-120)/90
70(x-120)=90(x-120)
20(x-120)=0
x-120=0
x=120
I wish you progress in your study and hope you will adopt it~~

Solving equation 120% X × 90% = x + 88

120％X × 90％=x+88
108%x=x+88
108%x-x=88
8%x=88
x=1100

Solution equation (x + 120) / 90 = (x-120) / 70

（x+120）/90=（x-120)/70
70（x+120）=90（x-120）
70x+8400=90x-10800
90x-70x=10800+8400
20x=19200
x=960

Solving equation 90% X * (1-20%) = 120

90%x*（1- 20%)=120
0.9x*0.8=120
0.72x=120
x=500/3

60% x + 90 = 120 (solving equation)

60%X+90=120
60%X=120-90
60%X=30
X=50

Solution: 162.5% - x = 15 / 16

X=15/16÷13/8
X=15/26

5 division = 1 / 5 solution equation 4.2x division 1.6-14 = 0.175 solution equation

5/(x+16.84)=1/5
I want to multiply diagonally
x+16.84=25
x=8.16
4.2x/16-14=0.175
4.2x/16=14.175
4.2x=226.8
x=54

9 ^ x = 3 ^ x + 3 to solve the equation

9^x=3^x+3
(3^x)^2-3^x=3
(3^x-1/2)^2=3+1/4
3^x-1/2=±√13/2
3^x=(1±√13)/2
∵3^x>0
∴3^x=(1+√13)/2
x=log3 (1+√13)/2