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Sagot :
Present ages:
Rachel = x
Jerome = x + 8
Lawrence = 2(x+8) or 2x + 16
Ages in 8 years, future (present ages + 8)
Rachel = x + 8
Jerome = x + 8 + 8 or x + 16
Lawrence = 2x + 16 + 8 or 2x + 24
Equation: In 8 years, Lawrence will be 3 times as old as Pearl
2x + 24 = 3 (x + 8)
2x + 24 = 3x + 24
3x - 2x = 24-24
x = 0
Their ages at present:
Rachel: x = 0 (baby)
Jerome: x + 8 = 0 + 8 = 8 years old
Lawrence: 2x+16 = 2(0) + 16 = 16 years old
Future, in 8 years:
Rachel: 0 + 8 = 8 years old
Jerome: 8 + 8 = 16 years old
Lawrence: 16 + 8 = 24 years old
Rachel = x
Jerome = x + 8
Lawrence = 2(x+8) or 2x + 16
Ages in 8 years, future (present ages + 8)
Rachel = x + 8
Jerome = x + 8 + 8 or x + 16
Lawrence = 2x + 16 + 8 or 2x + 24
Equation: In 8 years, Lawrence will be 3 times as old as Pearl
2x + 24 = 3 (x + 8)
2x + 24 = 3x + 24
3x - 2x = 24-24
x = 0
Their ages at present:
Rachel: x = 0 (baby)
Jerome: x + 8 = 0 + 8 = 8 years old
Lawrence: 2x+16 = 2(0) + 16 = 16 years old
Future, in 8 years:
Rachel: 0 + 8 = 8 years old
Jerome: 8 + 8 = 16 years old
Lawrence: 16 + 8 = 24 years old
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