We start with the equation: \[ 3x + 5 = 20. \] To isolate \( x \), first subtract 5 from both sides: \[ 3x = 20 - 5 \implies 3x = 15. \] Now, divide both sides by 3 to solve for \( x \): \[ x = \frac{15}{3} = 5. \] Thus, the correct answer is (B) 5.
A sum of Rs. 800 amounts to Rs. 920 in 3 years at simple interest. What would be the amount, if the interest rate is increased by 3%?
In what ratio must water be mixed with milk to gain 20% by selling the mixture at cost price?
A sum of Rs. 800 amounts to Rs. 920 in 3 years at simple interest. What would be the amount, if the interest rate is increased by 3%?
In what ratio must water be mixed with milk to gain 20% by selling the mixture at cost price?