35% X-1 and 1 / 2 = - 15% x + 3 to solve the equation

35% X-1 and 1 / 2 = - 15% x + 3 to solve the equation

35% X-1 and 1 / 2 = - 15% x + 3 to solve the equation
0.35x-3/2=-0.15x+3
1/2x=3/2
x=3
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Solving equation (X-5) / 5 = (x + 13) / 7

X=50

How to solve the equation of 13 (x + 5) = 169

The final result is 8,
13X+65=169
13X=104
X=104/13=8

1 / 2 is equal to 0.5, to the whole, good to 50 points, our math teacher said did not recite out to copy many times, I have more than 200 points, as long as you can help me

1/2=0.5 1/4=0.25 3/4=0.75 1/5=0.2 2/5=0.4 3/5=0.6 4/5=0.8 1/8=0.125 3/8=0.375 5/8=0.625 7/8=0.875 1/20=0.05

Sixth grade mathematics volume I fractional decimal who has a quick solution ah

First of all, we need to make clear that there are two kinds of fractional conversion: one is that fraction can be converted into finite decimal (a simplest fraction, denominator decomposition, only factor 2 and 5 can be converted into finite decimal), such as 8 = 2 × 2 × 2,25 = 5 × 5, etc.; the other is that fraction cannot be converted into effective decimal, such as 6 = 2 × 3,12 = 2 × 2 × 3, etc
Because the denominators of commonly used fractions are not very large, there are only a few denominators that can be converted into finite decimals: 2, 4, 5, 8, 10, 16, 20, 25, 50, 64, etc, 1 / 2 = 0.5 1 / 4 = 0.25 3 / 4 = 0.75 1 / 5 = 0.2 2 / 5 = 0.4 3 / 5 = 0.6 4 / 5 = 0.8 1 / 8 = 0.125 3 / 8 = 0.375 5 / 8 = 0.625 7 / 8 = 0.875. These interactions are very regular, just work hard!
The denominator is a fraction of 20. If the numerator and denominator are expanded 5 times at the same time and the denominator is a fraction of 100, it can be directly changed into a decimal
The denominator is a fraction of 25. As long as the numerator and denominator are expanded 4 times at the same time, the fraction whose component denominator is 100 can be directly changed into a decimal
There are a few that can't be reduced to finite decimal: 1 / 3 ≈ 0.333 1 / 6 ≈ 0.167 5 / 6 ≈ 0.833 just remember
The rest is not commonly used, you use the numerator to remove the denominator to calculate it!
Hope to help you, wish you better and better!

After the decimal point of number a is moved one place to the right, the number obtained is 18.9 larger than the original number______ ．

10a-a = 18.9 & nbsp; & nbsp; & nbsp; & nbsp; 9A = 18.9 & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; a = 2.1, so the answer is: 2.1

After moving the decimal point of a decimal two places to the left, it is 1.98 less than the original number, which is ()

Original number = 1.98 (1-0.01) = 2

After moving the decimal point of a decimal to the right by two digits, it adds 100.98 to the original value?

(100.98 / 99) * 100 = 102.00. This number is 102.0

The decimal point of the decimal is moved two places to the left, and the decimal is reduced by 100 times. Why?

That's right. If the decimal point is moved one place to the left, the number (including integers and decimals) will be reduced by 10 times. If the decimal point is moved two places to the left, it will be reduced by 100 times

A decimal is expanded by 100 times, and then the decimal point is moved one place to the left. The number is 23.5. What is the original decimal?

2.35
Expand 100 times 235
Move the decimal point one place to the left 23.5