Solving the equation 3x minus 3 / 4 equals 3 / 4, 12 "x plus 2" equals 42

Solving the equation 3x minus 3 / 4 equals 3 / 4, 12 "x plus 2" equals 42

3x-3/4=3/4
3x=3/2
x=1/2
12(x+2)=42
x+2=42/12
x+2=7/2
x+2=3.5
x=1.5

It's just a solution to the equation. The quadratic equation of one variable is 5x ^ 2 + 1 = 3x
With the formula method, there are matching methods and so on
The answers are all wrong

2-ary 1-degree + 1-ary 1-degree + constant are generally cross multiplication
5x^2+1-3x=0
cross multiplication
5 1 5 3 5 -3 5 -1 -5 -1 -5 -3 -5 1 -5 -3
1 -3 1 -1 1 1 1 3 -1 3 -1 1 -1 -3 -1 1
-15+1=-14 -5+3=-2 5-3=2 15-1=14 -15+1=-14 -5+3=-2 15-1=14 -5+3=-2
I don't think I deserve it-

To solve the equation: X bisection + 3x + (x bisection + 3x) 8 = - 6

Let y = x & # 178; + 3x  y + 8 / y = - 6y & # 178; + 6y + 8 = 0  (y + 2) (y + 4) = 0  y = - 2 or y = - 4  X & # 178; + 3x = - 2x & # 178; + 3x = - 4x & # 178; + 3x + 2 = 0 X & # 178; + 3x + 4 = 0  x = - 1, x = - 2 test: x = - 1, x = - 2 is the solution of the equation; X = - 1 or x = - 2 is the solution of the equation

(3x + 7) / (x + 6) = 2, fast solution!

（3x＋7）/（x＋6）＝2
3x+7=2（x+6）
3x+7=2x+12
x=12-5
x=7
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