In March, William saved $60 of his pocket money and spent the rest. In April, he saved 25% less and his spending increased by 10%. Given that he had the same amount of pocket money each month, how much was William's pocket money?
Q. In March, William saved $60 of his pocket money and spent the rest. In April, he saved 25% less and his spending increased by 10%. Given that he had the same amount of pocket money each month, how much was William's pocket money?
March Savings: In March, William saved $60. This is the amount he didn't spend.
April Savings: In April, he saved 25% less than in March. So, he saved 75% of what he saved in March.Calculation: 75% of $60 = 0.75×$60=$45.
April Spending Increase: His spending in April increased by 10% compared to March. If S is his spending in March, then his spending in April is S+0.10S=1.10S.
Pocket Money Calculation: Since his pocket money is the same each month, let's call it P. In March, he saved $60, so he spent P−$60.
Equation Setup: In April, he saved $45, so he spent P−$45. But this amount is 10% more than what he spent in March.Calculation: P−$45=1.10(P−$60).
Equation Solution: Now we solve the equation for P.P−$(45)=1.10(P−$(60))P−$(45)=1.10P−$(66)Subtract P from both sides: −$(45)=0.10P−$(66)Add $(66) to both sides: $(21)=0.10PDivide both sides by 0.10: P=$(21)/0.10
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