y is the sum of twice a number and 3
The phrase a number means an arbitrary variable, let's call it x.
x
twice a number means we multiply x by 2:
2x
the sum of twice a number and 3:
2x + 3
The word is means equal to, so we set 2x + 3 equal to y
y = 2x + 3
The phrase a number means an arbitrary variable, let's call it x.
x
twice a number means we multiply x by 2:
2x
the sum of twice a number and 3:
2x + 3
The word is means equal to, so we set 2x + 3 equal to y
y = 2x + 3