f) \( 0,75 x-x+1 \frac{1}{4} x=20 \% \)
x = 0.2
Step 1 :\( 0.75x - x + 1.25x = 0.2 \)
Step 2 :\( 0.75x - 1x + 1.25x = 0.2 \)
Step 3 :\( -0.25x + 1.25x = 0.2 \)
Step 4 :\( 1x = 0.2 \)
Step 5 :x = 0.2