DIVIDE
-8:2a
-4/a
5a+b-3a+b
2a+2b
2a·3a
6a2
3x+4=10
x=2
The base of a rectangle is double its height. If the Perimeter of the rectangle is 36cm, what are the lengths of the base and the height?
height=6cm
base=12cm
6x2y:2xy
3x
x2-5x+2x
x2-3x
-2x·-3x2
6x3
11+2x=6x-3+3x
x=2
If we add a natural number to the double of the next number, the result is 14. What is the number?
The number we are looking for is 4
-20ab3c:6b3c
-10a/3
a2+a-7+2a+5-8a2
-7a2+3a-2
5(2x-3)-4(x-4)
6x+1
6x-7-4x=2x-11-3x
x=-4/3
A ball of iron weights 6gr more than a ball of stone. The weight of 3 balls of iron is equal to the weight of 5 balls of stone. How many gr does a ball of stone weigh? And a ball of iron?
A ball of stone weights 9gr, and a ball of iron weights 15gr
32x2yz4:(-20xy2z4)
-8x/5y
2a5-5b5+9a5b5-4ab5+3a5b
left at it is
3a·(1-4ab)
3a-12a2b
5x-7+2x=3x-3+4x-5
Doesn't have a solution
In the supermarket one kilo of strawberries costs €1.80 more than the oranges. A 5 kg bag of oranges is sold at the same price as a 2 kg box of strawberries How much is one kilo of oranges? And one kilo of strawberries?
The oranges cost 1.20 €/kg
The strawberries cost 3 €/kg
45m3q4r:18m2q3r3
5mq/2r2
-s3q+20qs2-9qs3+2s-34s2q
-10s3q-14qs2+2s
-x2·(-3x+x2+2y)
3x2-x3-2xy
(2x-5)-(5x+1)=8x-(2+7x)
x=1/2
Eva is 9 years older than her cousin Roberto, and 3 years later she will be twice as old as Roberto. How old are Eva and Roberto?
Eva is13 years old and Roberto is 6