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put this solution on YOUR website!Three numbers: x, y, z
;
"the sum of three numbers is 95."
x + y + z = 95
;
" the sum of the first and the second is twenty five more than the third number "
x + y = z + 25
:
" the third is twice the first."
z = 2x
:
find the numbers.
:
rewrite the 2nd equation and subtract from the 1st equaion
x + y + z = 95
x + y - z = 25
-----------------subtraction eliminates x and y, find z
2z = 70
z = 35
therefore
2x = 35
x = 17.5
:
Find y:
17.5 + y = 35 + 25
y = 60 - 17.5
y = 42.5
;
:
Check the sum of the three numbers
17.5 + 42.5 + 35 = 95
