Answer:
The correct/valid answer is 20.
Step-by-step explanation:
Step 1: Multiply both sides by 100
<em>y*100 = 0.25(100-y)*100</em>
Step 2: Refine
<em>y*100 = 25 (100-y)</em>
Step 3: Expand 25(100-y) : 2500 - 25y
<em>y*100 = 2500-25y</em>
Step 4: Add 25y to both sides of the givn equation
<em>y*100+25y = 2500-25y+25y</em>
Step 5: Simplify the equation
<em>125y = 2500</em>
Step 6: Divide both sides of the equation by 125
<em>125y/125 = 2500/125</em>
Final step: Simplify
<em><u></u></em>
<u><em>y=20</em></u>
<u><em>Mark as brainliest please, i need a few more :D</em></u>
