Question

the um of two numbers re 145. the smaller number is decreased by 2 and the larger number is increased by 1. their ratio are 2:7. Find the two numbers ??? .. can you plss help me solving itt?? :((

Answer 1

let 2 numbers be x be smaller number and y larger
then
x + y = 145
also
(x - 2) / (y + 1) = 2/7

solve for x and y

Answer 2

cross multiplying second equation:
7x - 14 = 2y + 2
7x - 2y = 16...............(1)
multiply original first equation by 2:
2x + 2y = 290.............(2)

now you can solve (1) and (2) by elimination method

Answer 3

where 290 came from Friend???

Answer 4

145 * 2: multiplying x + y = 145 by 2 , so as to get -2y and adding will eliminate y

Answer 5

when multiply an equation you must multiply every term

Answer 6

from the second equation friend, where do 2x came from?