A cup of 90 grams of salt water, salt accounts for 8% of the water, if 10 grams of salt is added to the salt water, what percentage of salt accounts for?

A cup of 90 grams of salt water, salt accounts for 8% of the water, if 10 grams of salt is added to the salt water, what percentage of salt accounts for?

Salt accounts for 1 / 8 of salt water (1 + 1 / 8) = 1 / 9
(90×1/9+10)÷(90+10)=20%

A cup of salt water weighs 240 grams, and salt accounts for 1 / 5 of water. After adding some salt, eye accounts for 1 / 4 of salt water. How many grams of salt are added?
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Let x g of salt be added
(240/5+x)/(240+x)=1/4
x=16

A kind of salt water, salt content is one ninth of water. 800 grams of such salt water, how many grams of salt?

The content of salt is one ninth of that of water, that is to say, the content of salt is one tenth of the total mass. 800 grams of salt water contains 80 grams of salt

Solving equation (1-4 / 7) x = (X-5) * 12 / 23

(1-4 / 7) x = (X-5) * 12 / 23 3 / 7X = 12 / 23x-60 / 23 12 / 23x-3 / 7X = 60 / 23 84x-69x = 420 15x = 420 x = 28, please click the "adopt answer" button below to send us a little red flower for encouragement! If you don't understand, you can continue to ask!

Solve equation x + 40% x = 28

X+40％X=28
x+0.4x=28
1.4x=28
x=28÷1.4
x=20

Solving equation 40 (48-x) = 28

1920—40x=28
40x=1892
x=47.3

Solve equation 12:7 = x: 0.3

Cross multiplication, the product of internal terms equals the product of external terms, 12 * 0.3 = 7x
7x=3.6
X = 18 / 35

7 out of 12 plus x = 11 out of 12

7/12+x=11/12
x=11/12-7/12
x=4/12
x=1/3

12.5-x = 7.2

12.5-x=7.2
x=12.5-7.2
x=5.3
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6 / x = 12.6 / x + 7.5

21.6/x=12.6/x+7.5
9/x=7.5
x=9/7.5=6/5