1 27 35 31 41 49 111 55 79 81 213 which is prime and which is composite

1 27 35 31 41 49 111 55 79 81 213 which is prime and which is composite

Quality: 31 41 79
Total: 27 35 59 111 55 81 213
Non quality and non conformity: 1

3x-1 / 8 = 7 / 8 x + (1 / 4 + 1 / 3) = 2 / 3

3x-1 / 8 = 7 / 8
3x=7/8+1/8
3x=1
x=1/3
X + (1 / 4 + 1 / 3) = 2 / 3
x=2/3-1/3-1/4
x=1/3-1/4
x=1/12
If you don't understand this question, you can ask,

(3x-1) / 2 - 3 = (4x-7) / 3, find X
fast

Multiply both sides of the equation by 6, and it becomes: 3 (3x-1) - 18 = 2 (4x-7), that is, 9x-21 = 8x-14, x = 7

x/3+3x/2=7

x/3+3x/2=7
Multiply it by six
2x+9x=42
11x=42
x=42/11

2-2\3x-1=2\7+3\x-14

Transference
2-1+14-2/7=3/x+2/3x
Multiply x on both sides of the equation
103x/7=3+2/3
Multiply both sides of the equation by 7 / 103 at the same time
x=77/309
If there is no problem with your expression, it is the answer;
At least there is no objection from the two upstairs. Hehe, it's not bad talk about you. It's true

6.3x-8*7.5%=2.1

x=3/7

Solving the equations {x + 1 / 2Y = 4 3x + 2Y = 8

(1) 4 - (2)
x=8
Substituting x = 8 into (1) yields
8+1/2y=4
∴y=-8
The solution of the system of equations is
x=8
y=-8

Complete steps of solving equations X / 4 + Y / 3 = 7,2 / 3x + Y / 2 = 14
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The system of equations {X / 4 + Y / 3 = 7} {2 / 3x + Y / 2 = 14} the original system of equations is arranged as {3x + 4Y = 84} both sides of equation (1) are multiplied by 12, and the coefficients are changed into integers {4x + 3Y = 84} both sides of equation (2) are multiplied by 12

Solve the equations 1.3x + 2Y = 21,2x-y = 14,2.4 of X + 3 of y = 7,3 of X + 2 of y = 8

1.3x + 2Y = 21 (1) 2x-y = 14 (2) (1) = (2) * 2: 7x = 49x = 7 substitute (2) to get: y = 0 so: the solution of the equation is: x = 7; y = 02. X / 4 + Y / 3 = 7 (1) x / 3 + Y / 2 = 8 (2) (1) * 6 - (2) * 4: 3x / 2-4x / 3 = 109x-8x = 60x = 60 substitute (2) to get: y = - 24 the solution of the equation is

2X + 3Y = 0 3x-2y = - 13 to solve the equations

2x+3y=0 （1）
3x-2y=-13 （2）
(1) Multiply 3 to get 6x + 9y = 0
(2) Multiply 2 to get 6x-4y = - 26
Further subtraction: 13y = 26
Y = 2, substituting (1) to get:
2x+6=0
x=-3；
So: x = - 3; y = 2