Algebraic Equations
n-5=13
n=8
1/2 + 2/5
9/10
2.5+4.2
6.7
A machine makes 1/2 kg of cement in one minute. How long does it take for the machine to make 3/4 kg of cement?
1,5 minute or 1 1/2
In a drawing, there are three circles, four stars, and three triangles. What is the ratio of stars to the total number of shapes.
2/5 or 4/10
1/3*n-2=3
n=15
7/8 ÷ 3/16
4 2/3 or 14/3
1.1*1.1
1.21
A tailor needs 6.5 meters of cloth to make a dress. If he has 78 meters of cloth, how many such dresses can he make?
12
The number of boys is 3/7 of the number of girls in a school. What is the ratio of the number if boys to the total number of children?
3/10
3/4*n=9
n=12
4/5÷7/9
1 1/35
7.25/0.5
14.5
Hillary earned $45 babysitting. If she babysat for 6 hours, how much money she was paid per hour?
$7.5
The recipe calls for 2 eggs for every 8 cups of flour. How many eggs are needed with 40 cups of flour?
10 eggs
1/10*q+18=20
q=20
7/12÷3/8+2/3
2 2/9
8.8*4 - 5/0.25
15.2
30 buses can carry 1500 people. What is the number of people that can be carried by 5 buses?
250
There are 40 rabbits in a cage. The ratio of white rabbits to grey rabbits is 3:7. How many white rabbits are in the cage?
12 white rabbits
1/2*x+x-21=3
x=16
1/2÷3/12+2/5*1/4
2 1/10 or 2.1
7.5*(3.9+1.6)/0.15
275
The total mass of 25 apples is 3.75 kg. The mass of a watermelon is 15.8 times the average mass of an apple. If all the apples have the same mass, find the total mass of one apple and the watermelon.
2.52 kg
There are 75 mice in a cage. The ratio of pink mice to black mice is 2:3. How many black mice are in the cage?
45 mice