Answer:
a = 18
Step-by-step explanation:
3(x+6)-x = 2x + a
Distribute
3x +18 -x = 2x+a
2x +18 = 2x+a
Subtract 2x from each side
18 = a
Answer:
₹900
Step-by-step explanation:
Let x represent the amount loaned at 10%. Then (1500-x) is the amount loaned at 7%, and the total interest for 3 years is ...
i = Prt
396 = x(0.10)(3) + (1500-x)(0.07)(3)
396 = 0.09x +315 . . . . . simplify
81 = 0.09x . . . . . . . . . . . subtract 315
81/0.09 = x = 900 . . . . . divide by the coefficient of x
The sum lent at 10% was ₹900.
Think of investments. If you were to invest $100 into a company and receive $200 dollars, then you would have made $100 in profit, which is 100% of your initial amount. So, if you were to invest $100 and receive $250 dollars in profit, then you would have made an extra $150, which is even more than your initial amount of $100. In this case, you would have made a 150% increase on your money.
