Writing Equations
Solutions by Addition/Subraction
Solutions by Multiplication/Division
Multi-step Solutions
SAT Prep
100
3 times some number is 15
What is 3x=15
100
x+3=5
What is x=2
100
3x=15
What is x=5
100
2x - 4 =20
What is x=12
100
2(5+2(6+3x4))=? a)32 b)41 c)51 d)72 e)82
What is 82 2(5+2(18))= 2(5+36)= 2(41)=82
200
Twice a number
What is 2x
200
x-15=-3
What is 12
200
5x=20
What is x=4
200
5x + 1=-34
What is x=-7
200
If 4/5=5/x, then x= a)4/25 b)4 c)25/4 d)5 e)6
What is x=25/4 5x=4x20 5x=80 x=16
300
Twice a number plus 5 equals 81
What is 2x + 5=81
300
x-4.8=12.8
What is x=17.6
300
(1/3)x=12
What is x=36
300
2x - 1= x +5
What is x=6
300
What is 20% of 30? a)2 b)3 c)6 d)9 e)10
What is 6 20%=.20 .20 x 30=6
400
Ten times a number subtracted from 20 is 5
What is 20-10x=5
400
4 + (1/2) + x= -1+(1/2)
What is x=-6
400
-4x=28
What is x=-7
400
3x + 1 = 7 + x
What is x=3
400
150% of 150 is equivalent to what number? a)100 b)175 c)200 d)225 e)250
What is 225 150%=1.5 150c 1.5=225
500
Four times a number equals two-thirds the number plus 33
What is 4x=(2/3)x + 33
500
3+(1/2) -x= 5 +(1/2)
What is x=-2
500
-(1/2)x=20
What is x=-40
500
(1/2)x - 1 = 5- (2/3) x
What is x=3
500
20% of a particular number is 30. What is the number? a)6 b)15 c)60 d)120 e)150
What is 150 30 represents 20% of what number 30/.20=150
M
e
n
u