Cecilia M. answered • 10/27/20
Tutor
4.9
(261)
Experienced Teacher Specializing in Mathematics for ages 3 - 50+
The sum of two numbers is 42. One number is two times as large as the other number.
x + y = 42
y = 2x
substitute 2x for y
x + 2x = 42
combine like terms
3x = 4
divide by 2 to get x by itself
3x / 3 = 42 / 3
x = 14
therefore
one number is 14 and the other number is 28
Check your answers
14 + 28 = 42
