Question

pls answer this very very urgent
needed step by step answer
correct answer = brainliest and follow ​

Answer 1

Step-by-step explanation:

1. Let their ages be x and y respectively

• according to question
• difference in their ages x — y = 10
• 15 years ago
• x-15 = 2 (y-15)
• x = 10+y
• 10+y-15 = 2y-30
• y-5 = 2y-30
• 2y-y = 30-5
• y = 25
• x = 10+25 = 35
• theirs ages are 35 years and 25 years respectively

2. Lets the man age be = x

His grandson age be = y

• According to question
• x = 10 y
• x = 54 + y
• 10y = 54+y
• 10y - y = 54
• 9 y = 54
• y = 54/9
• y = 6
• x = 54 + 6 = 60
• mans age is 60 years and his grandson age is 6 years

3. Let the numbers be x and y

• x : y = 8 : 3
• x + y = 143

$\frac{x}{y} \: = \frac{8}{3}$

$3x \: = \: 8y$

$x \: = 143 - y$

$3 \times (143 - y) = 8y$

$429 - 3y = 8y$

$429 = 8y + 3y$

$429 = 11y$

$y = \frac{429}{11}$

$y = 39$

$x = 143 - 39$

$x = 390$

the two numbers are 390 and 39

Answer 2

Answer:

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