Question

gerald has two sons, the age of the older son is 3 more than twice the age of the younger ,the product of their ages is 140 .how old is the younger son?
Help me please

Answer 1

Step-by-step explanation:

let age of younger son will be=X

older son will be=2(X+3)

product of their age is 140

(2x+6)*X=140

2x sqware+6x-140

divide by 2

X square+ 3x -70

factorisation method

X square+10x-7x-70

first 2 m s common

than last 2 m se common lege

X(X+10)-7(X+10)

X+10=0

X=-10

x-7=o

X=7

check

2(X+3)*X=140

2(7+3)*7= 140

hence proof