1.5 of x = 2 of 3

1.5 of x = 2 of 3

1.5 of x = two thirds
1.5 is a molecule. If we expand the coefficient first, we can understand it as
15 out of x = 20 out of 30, so 20x = 30 times 15
So we know that x is 22.5

0.3 X-1 - 0.5 x + 2 = 1.2
And the answer is 6.4

（x-1）/0.3 -（x＋2）/0.5=1.2
Multiply both sides of the equation by 3
10（x-1）-6（x+2）=3.6
10x-10-6x-12=3.6
4x=25.6
x=6.4

Solution equation: 2.5 * (55 + x) = 300

2.5*（55+x）=300
137.5+2.5x=300
2.5x=300-137.5
2.5x=162.5
x=65

X × 2 / 5 - (300-x) × 1 / 4 = 55 write every step to solve the equation

X×2/5-(300-X)×1/4=55
Multiply both sides by 20
8x-5(300-x)=1100
13x=2600
x=200

X 2 + X 5-x 2-x 3 = x 2-1 8

Multiply both sides by X (x + 1) (x-1)
5(x-1)-3(x+1)=8x
5x-5-3x-3=8x
-6x=8
x=-4/3
The test shows that x = - 4 / 3 is the solution of the equation

3^2+(x-1)^2=x^2 9+x2-2*x+1=x^2 2x=10 x=5

"^" is a mathematical symbol used to represent the third level operation. When inputting a mathematical formula on a computer, because it is not convenient to input the power, the symbol is often used to represent the power. For example, the 5th power of 2 is usually represented as 2 ^ 5. "*" means the multiplier sign

Given that x 2 = x + 1, find the value of one of x 2 + x 2

Because x ^ 2 = x + 1, x ^ 2-1 = X
The squares on both sides are: (x ^ 2-1) ^ 2 = x ^ 4-2x ^ 2 + 1 = x ^ 2
Then: x ^ 4 + 1 = 3x ^ 2
So x ^ 2 + 1 / x ^ 2 = (1 + x ^ 4) / x ^ 2 = 3x ^ 2 / x ^ 2 = 3

How many out of 10?

22

6 out of 5 "5 out of 10-6 (x-1)" = 1, x =?
"Is a bracket

6 out of 5 ＂ 5 out of 10-6 (x-1) ＂ = 1
6 out of 5 * 10-5 out of 6 * 6 out of 5 (x-1) = 1
12-(x-1)=1
12-x+1=1
x=12+1-1
x=12

1 / 2 (x + y) of 5-2 (x + y) of 3-3 (x + y) of 3-1 / 2 (x + y) of 3-3 (x + y) of 3-1 / 2 (x + y) of 3, where x = 3-y

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