The wrestler gained 5.20 kilograms per month.
Step-by-step explanation:
Let,
x be the weight gained every month.
y be the original weight before weight gain.
According to given statement;
0.5x+y=80.6 Eqn 1
2x+y=88.4 Eqn 2
3.5x+y=96.2 Eqn 3
Subtracting Eqn 1 from Eqn 2
[tex](2x+y)-(0.5x+y)=88.4-80.6\\2x+y-0.5x-y=7.8\\1.5x=7.8[/tex]
Dividing both sides by 1.5
[tex]\frac{1.5x}{1.5}=\frac{7.8}{1.5}\\x=5.20[/tex]
The wrestler gained 5.20 kilograms per month.
Keywords: linear equation, subtraction
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