Twelve more than two times a number is ten. Write an equation and solve for the number.
2x + 12 = 10 x=-1
200
−104 = 8x
x = -13
200
-4x + 2 = -14
x = 4
200
21 = −7n
n = -3
200
20 -10x = -100
x = 12
200
A square has a side length of 2x+5 and another side length of 15. Find the value of x by writing an equation and solving.
x = 5
300
−16 + x = −15
x = 1
300
a - 4 = -20
a = -16
300
18 + m = 8
m = -10
300
y - 1/2 = 3/8
y = 7/8
300
Andres bought an Xbox One for 1/3 of the price. He ended up paying $90 for it. What was the original price of the Xbox One? Write an equation and solve.
(1/3)x = 90 x = $270 was the original price
400
-10n = -40
n = 4
400
(a - 3)/-12 = 3
a = -33
400
-6 + n = - 22
n = -16
400
18 = 3(x-6)
x = 12
400
Raymond pays a monthly fee of $50 to get professional football trained. Each hour of training he gets charged $10. If his last monthly bill was $250, how many hours did he get trained? Write an equation and solve.
10x + 50 = 250 x=20 hours
500
-(1/2)x = 10
x = -20
500
30 = -5(n+6)
n = -12
500
(2/3)x = -20
x = -30
500
(a+10)/5 = -4
a = -30
500
Kevin bought the same amount of video games each month for a year. He had 10 video games to start with and after the year he now has 46. How many video games did he buy each month? Write an equation and then solve it.