Simple calculation of 3x × 60% = 4 / 15

Simple calculation of 3x × 60% = 4 / 15

3x×60%＝4/15
3x=4/9
x=4/27
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How to calculate x-40% x + 1200 = 2 / 3x

The result is 18000

A simple method to calculate minus 12 / 25 divided by minus 3 / 5 multiplied by 5 / 4

If the polynomial (M + 2) x ^ 3-2x ^ my-5 is a quartic trinomial of X and y, then what is m = and what is the coefficient of the trinomial?
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∵ polynomials (M + 2) x ^ 3-2x ^ my-5 are quartic trinomials of X and y
That is, M = 3
m+2=5
The coefficient of cubic term = 5

50 kg of 60% alcohol solution is prepared from 90% and 45% alcohol solution. Use X and y to represent 90% and 45% alcohol solution respectively, fill in the following table, set up equations, and calculate the values of X and Y. 90% alcohol solution & nbsp; 45% alcohol solution & nbsp; & nbsp; & nbsp; Mass of 60% alcohol solution after mixing (kg) x y 50 mass of pure alcohol (kg)______ Water content mass (kg)______

From the meaning of the question, 0.9x + 0.45y = 300, 1x + 0.55y = 20, the solution is: x = 503y = 1003, a: the mass fraction of 90% is 503kg, the mass fraction of 45% alcohol solution is 1003kg. So the answer is: 0.9x, 0.45y, 30, 0.1X, 0.55y, 20

How to find 1 / 4 and 7 / 16?

The denominator is 80, 1 / 5 = 16 / 80, 1 / 4 = 20 / 80, 7 / 16 = 35 / 80

1 + 4 + 7 + 10 + 13 + 16 + -. + 97 + 100 how to calculate in a simple way, and the answer is quick,

1+4+7+10+13+16+.+97+100
=1+100+4+96+7+94+..+49+52
=101+101+...+101
=101*17=1717

Calculation: 11 and 3 / 4 - (+ 3.25) - (- 8 and 1 / 2) - (+ 0.75) - 20 and 1 / 4
Thank you for the process

=11.75-3.25+8.5-0.75-20.25
=(11.75-0.75)+8.5-(3.25+20.25)
=11+8.5-23.5
=19.5-23.5
=-4

14 divided by 0.56 =? (please list the vertical and check calculation.)

(- 2 and 2 / 5) + 3 and 1 / 4 + (- 3 and 2 / 5) + 2 and 3 / 4 + (- 1 and 1 / 2) + 1 and 1 / 3?

(- 2 and 2 / 5) + 3 and 1 / 4 + (- 3 and 2 / 5) + 2 and 3 / 4 + (- 1 and 1 / 2) + 1 and 1 / 3
=(3 1 / 4 + 2 3 / 4) - (2 2 / 5 + 3 2 / 5) + (1 1 / 3-1 1 / 2)
=6-5 and 4 / 5-1 / 6
=1/5-1/6
=6/30-5/30
=1/30