Writing An Expression
A number decreased by twenty.
n-20
n - 12, if n=20
8
5x + 7x
12x
8n = 56
n=7
3x + 4 = 10
x=2
The quotient of ten and a number
10/n
-3n, if n= -5
15
3y - 5 + 8
3y+3
n - 12 = 20
n=32
4n - 20 = 8
n=7
Double a number, then increased by five
2n+5
50/n , if n= -2
-25
4m - 4 - 8m + 5
-4m + 1
n/6 = 12
n=72
-3x + 10 = -11
x=7
The sum of a number and seven, then multiplied by ten.
10 (n+7)
2n - 7, if n=3
-1
2x + 3y -4x + 9y
-2x + 12y
y - 4 = -12
y= -8
2x -1 - x = 5
x=6
Three times the quotient of a number and eight.
3n/8
n2 - 5, if n=10
95
x2 + 3x - 4 + 5x + 7
x2 +8x +3
-9x = -36
x = 4
9y + 3 - 7y - 5 = 8
y=5