21 △ x = 2 and 1 / 3 solution

21 △ x = 2 and 1 / 3 solution

21 △ x = 2 and 1 / 3
（21/100）/ X = 7/3
100x = 21/（7/3）
100x = 21*3/7
100x = 9
x = 9/100

1-75% x = 3 / 4, solve the equation

0.75x=1-3/4;
0.75x=0.25;
x=1/3;
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1-25% x = 0.75; 34x − 25% x = 10; 2x − 18 × 4 = 23

（1）1-25%x=0.75   1-25%x+25%x=0.75+25%x             1=0.75+25%x        1-0.75=0.75-25%x-0.75          0.25=25%x     0.25÷25%=25%x÷25%              x=1；（2）34x-25%x=10          12x=10       12x÷12=10÷12            x=20；（3）2x−18×4＝23          2x-12=23         2x-12+12=23+12             2x=76          2x÷2=76÷2              x=712．

Solve the equation. (x / X-5) - (4 / X-5) = 9

(x/x-5)-(4/x-5)=9
（x-4)/(x-5)=9
x-4=9x-45
8x=41
x=41/8