A number is increased by 9 is 15. What is the number?
Let x be that number.
x+ 9= 15
x=15-9
x= 6
∴ The number is 6.
200
Solve for z-18= 7
z-18= 7
z= 7+18
z= 25
200
Solve for -2a+5=18
-2a+5=18
-2a= 18-5
-2a=13
-2a/-2=13/-2
a=13/-2 or -6.5
200
Solve for 4x-6=6x
4x-6=6x
4x-6x=6
-2x=6
-2x/-2=6/-2
x=-3
200
Simplify 2a + 3a – n – 2n
2a + 3a – n – 2n
= 5a - 3n
200
A number is tripled and increase by 2. What is that number?
3x+2
3x=-2
x=-2/3
∴ The number is -2/3
300
Solve the equation -5a= 25
-5a = 25
-5a/-5 = 25/-5
a = -5
300
Solve for 9x+4 = 12
9x+4= 12
9x=12-4
9x/9= 8/9
x=4/3 or 1.333333...
300
Solve for 8x-1=23-4x
8x-1=23-4x
8x+4x=23+1
12x=24
12x/12=24/12
x=2
300
Simplify 3(x + y)
3(x + y)
=3x+3y
300
Coach Travis purchased 30 more golf balls than baseballs this season. If she purchased a total of 96 balls, how many baseballs and golf balls did he purchase?
The coach purchased 33 baseballs and 63 golf balls.
400
Solve for p/5 = 8
p/5= 8
p = 8*5
p = 40
400
Solve for -3x+8=20
-3x+8=20
-3x+8-8=20-8
-3x=12
-3x/-3=12/-3
x=-4
400
Solve for 5+4x-7=4x-2-x
5+4x-7=4x-2-x
4x-2=3x-2
4x-3x=-2+2
x=0
400
Simplify 5m – 2n – (-5m – 2n)
5m – 2n – (-5m – 2n)
= 5m - 2n + 5m +2n
= 10m
400
Cherry is twice as old as Morgan. In five years the sum of their ages will be 34. How old is each girl?
Morgan is 8 years old and Cherry is 16.
500
Solve for 13-k=-6
13-k=-6
13+6=k
19=k
500
(-4/7)k-9=1
(-4/7)k-9=1
(-4/7)k=1+9
(-4/7)k=10
(-7/4)(-4/7)k=10(-7/4)
k=-70/4
k=-35/2 or -17.5