X-39 = 5 / 7 x + 7 equation

X-39 = 5 / 7 x + 7 equation

X-39=5/7X+7
2/7X=46
2X=46x7
X=23x7
X=161

The original price of a color TV set was 1280 yuan, but now the price is reduced by 1 / 4. How much is the price of each set now

Now the price of each set is = 1280 - 1280 x 1 / 4 = 960 yuan

The solution of equation 5 / 6 + 3 / 4 * x = 13 / 6 is X

3/4*X=13/6-5/6=8/6
X=8/6 * 4/3=16/9

Changhong color TV used to be 2000 yuan. After a 5% reduction, how much is the price of this kind of TV now?

Two thousand divided by five times four

Solution equation: 3 / x + 6 / (x-1) = (x + 13) / (x ^ 2-x)

3(x-1)+6x=x+13
3x-3+6x=x+13
8x=16
x=2
Test: x = 2 is the root of the equation

How much is the original price of a certain brand TV set? 3Q

If the original price is x, 90% x = 2430 x = 2700 will be obtained according to the meaning of the question

Solving the equation: X divided by 12 + 10 = x divided by 15 + 13
Let people understand

x/12+10=x/15+13
x/12-x/15=3
x/60=3
x=180

The original price of a commodity is 840 yuan, the first price reduction is 1 / 10, the second price reduction is 1 / 10, these two price reductions ()
1, equal 2, unequal 3, the first drop more 4, the second drop more

2,3

How much is x divided by 15 + X divided by 12 + X divided by 10 = 1365

The original price of a commodity is x yuan. The first price reduction is 10%, and the second price reduction is y yuan. After two price reductions, how much is the price?
Excuse me?
（1-10%）x-y
Can you work out the result?
If you can, please make a formula!

X*90%-Y