X minus 1 is a quarter of the difference between 2x and 1

X minus 1 is a quarter of the difference between 2x and 1

x-1=1/4(2x-1)
4x-4=2x-1
2x=3
x=3/2

One out of five (x minus one out of two) is equal to three out of five

1/5(x-1/2)=3/5
0.2x-0.1=0.6
0.2x=0.6+0.1
0.2x=0.7
x=0.7/0.2=3.5

One twentieth x plus seven sixths minus one twelfth x equals one?

1/20X+7/6-1/12X=1
3/60X-5/60X=1-7/6
-2/60X=-1/6
X=5

Five sixths of x minus twenty percent is one twelfth of X

5/6*X-1/5=1/12X
(5/6-1/12)*X=1/5
9/12*X=1/5
X=4/15

One half minus one third equals two times one third equals one sixth and one third minus one fourth equals three times one fourth
Then, one hundredth minus one hundredth equals (what percentage?) One part of n minus one part of N plus one part equals (parts)

One half minus one third equals two times one third equals one sixth and one third minus one fourth equals three times one fourth
Then one hundredth minus one hundredth equals one hundredth of (100 × 101)
One part of n minus one part of N plus one part equals one part of [n (n + 1)]

What is the difference of one third minus one fourth plus one fourth minus one fifth plus one fifth minus one sixth

（1/3-1/4）+（1/4-1/5）+（1/5-1/6）
=1/3-1/4+1/4-1/5+1/5-1/6
=1/3-1/6
=1/6

If the solutions of the equations 3x + y = K + 1, x + 3Y = 3 satisfy 1.5

The equations are added left and right, 4x + 4Y = K + 4, x + y = K / 4 + 1
one point five

If x and y are opposite to each other, find the value of 3x + 6 + 3Y + 5x / y

3x+6+3y+5x/y=3x＋3y＋5x/y＋6.
∵ X and y are opposite to each other
∴x＋y＝0,3x＋3y＝3﹙x＋y﹚＝0.
x/y＝－1,5x/y＝－5
∴3x+6+3y+5x/y
=3x＋3y＋5x/y＋6
＝0＋﹙－5﹚＋6
=1

It is known that a = 3x-2y, B = x-3y + 1

Given a = 3x-2y, B = x-3y + 1, find 3 (a + b) - 2 (a-b), the result is expressed by X and y
3（A+B)-2(A-B)
=3A+3B-2A+2B
=A+5B=3x-2y+5(x-3y+1)
=3x-2y+5x-15y+5
=8x-17y+5

Given 3x + 2Y = a, 2x + 3Y = B, then (x + y) (X-Y) =?

3x+2y=a,2x+3y=b
The two formulas can be obtained by adding
5x+5y=a+b
∴x+y=(a+b)/5
The two formulas can be obtained by subtracting
x-y=a-b
therefore
(x+y)(x-y)=(a+b)/5*(a-b)=(a²-b²)/5