97+x=0.6*(165+x)

97+x=0.6*(165+x)

97+x=0.6>

97 + x = 0.6 times (165 = x

97+x=0.6（165+x）
97+x=99+0.6x
0.4x=2
x=5

Solution equation: 6 (X-2) △ 4 = 10.5

6（X-2）÷4=10.5
6(x-2)=42
x-2=7
x=9

10 (1 / 6-x) = 2.5 (1 / 6 + 1 / 4 - x) to solve the equation

10×1/6-10x＝25/10×1/6＋25/10×1/4-25/10x
5/3-10x＝25/60＋25/40-25/10x
5/3-10x＝5/12＋5/8-5/2x
-10x＋5/2x＝5/12＋5/8－5/3
-15/2x＝-15/24
x＝1/12

The problem of urgently seeking the denominator of the first day of junior high school to solve the equation
Good score!

How to solve the equation X-2 / 0.2-x + 1 / 0.5 = 3, we can expand the denominator by 10 times

x-2/0.2-x+1/0.5=3,?
(x-2)/0.2-(x+1)/0.5=3,!
(x-2)/0.2-(x+1)/0.5=3
10(x-2)/2-10(x+1)/5=3
5(x-2)-2(x+1)=3
5x-10-2x-2=3
3x=3+12
3x=15
x=15/3=5.

Why must the denominator be multiplied by the least common multiple in the process of solving the equation?
What's the difference between the result of multiplying other common multiples and that in the title?

The number obtained by multiplying the least common multiple is the smallest, and the following calculation is also simple. Otherwise, the following number is too large and difficult to calculate, and in the end, you still want to get rid of it

2x-1 / 6-3x + 1 / 8 = x / 3-1 use the denominator to solve the equation! Find the least common multiple

2x-1 / 6-3x + 1 / 8 = x / 3-1 multiply by 24
4（2x-1）-3(3x+1)=8x-24
8x-4-9x-3=8x-24
-x-7=8x-24
8x+x=24-7
9x=17
x=17/9

3x (x + 2) = 4 times (x + 1) to solve the equation

3x(x+2)=4x(x+1)
3x+6=4x+4
3x-4x=4-6
x=2

Solve the equation: 2x (x + 1) - (3x-2) x + 2 times the square of x = the square of X + 1

After expanding the items, you will find that the items are deleted twice
There's only one left
4X=1
x=0.25