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a number added to 19

• 19-n
• 19+n
• 19/n
• 19n

the difference of a number and six

• x + 6

• x - 6

• 6 - x

• x/6

the quotient of a number and twelve

• x + 12

• x - 12

• 12/x

• x/12

Eight added to a number y.

• y + 8
• y - 8
• 8y
• 8/y

A number c divided into fourteen.

• c/14
• 14c
• 14/c
• c x 14

Twice a number g. 

• g2
• 2g
• 2/g
• 2 + g

Eighteen less than a number f. 

• 18 - f
• 18f
• 18 + f
• f - 18

w increased by 5

• w - 5
• 5w
• w + 5
• w / 5

the quotient of twenty and a number

• 20/n
• 20-n
• n+20
• n-20

A number increased by 30

• 30n

• n - 30

• n + 30

• 30 - n