3 / 5 (40-x) = 30-x (3x / 4 + 600) X3 / 2 = x-600 Solving equation with transfer term

3 / 5 (40-x) = 30-x (3x / 4 + 600) X3 / 2 = x-600 Solving equation with transfer term

1、3/5（40-X）=30-X
24-3/5X=30-X
2/5X=6
X=15
2、(3/4X+600)X2/3=X-600
1/2X+400=X-600
1/2X=1000
X=2000

If x ^ 2 + 3x + 1 = 0, then x + 1 / x =? Please write the process

Obviously, X is not equal to 0;
Divide both sides by X to get x + 3 + 1 / x = 0
x+1/x=-3

(3x-30) * 4 / 9 = X-9 (3x-30) * 4 / 9 = X-9
fast

Divide it into two binary linear equations, and then find it again. OK
Believe me, I am the Deputy monitor of our class