Answer:
y=50
Step-by-step explanation:
1. 100/2= 50
2. y=50
Answer: B. 20/30
Step-by-step explanation: 20/30 simplified to 2/3. Multiply each number by 2 to get 4/6. 4/6 is not the same number as 5/6.
Simplifying
10(2 + x) = 15(x + -1) + 5
(2 * 10 + x * 10) = 15(x + -1) + 5
(20 + 10x) = 15(x + -1) + 5
Reorder the terms:
20 + 10x = 15(-1 + x) + 5
20 + 10x = (-1 * 15 + x * 15) + 5
20 + 10x = (-15 + 15x) + 5
Reorder the terms:
20 + 10x = -15 + 5 + 15x
Combine like terms: -15 + 5 = -10
20 + 10x = -10 + 15x
Solving
20 + 10x = -10 + 15x
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '-15x' to each side of the equation.
20 + 10x + -15x = -10 + 15x + -15x
Combine like terms: 10x + -15x = -5x
20 + -5x = -10 + 15x + -15x
Combine like terms: 15x + -15x = 0
20 + -5x = -10 + 0
20 + -5x = -10
Add '-20' to each side of the equation.
20 + -20 + -5x = -10 + -20
Combine like terms: 20 + -20 = 0
0 + -5x = -10 + -20
-5x = -10 + -20
Combine like terms: -10 + -20 = -30
-5x = -30
Divide each side by '-5'.
x = 6
Simplifying
x = 6
Answer:
x = 15
Step-by-step explanation:
Given
5(x - 10) = 25 ( divide both sides by 5 )
x - 10 = 5 ( add 10 to both sides )
x = 15
Answer:
50%
Step-by-step explanation:
He sold it for Rs 15 each. What is his profit percent? CP of 1 pen = 120/12= 10 SP of 1 pen = 15 Profit = 5 P % = (p/CP)*100=(5/10) x 100 = 50%.