Substitution
y = 6x – 11
-2x - 3y = -7
x = 2
y = 1
−5x+13y=−7
5x+4y=24
x=4
y=1
x + 2y = -8
x + 2y = -2
No Solution
The sum of 2 numbers is 380. Their difference is 110. What are the numbers?
135 and 245
y + x = -3
24y = -15x - 27
x = -5
y = 2
y = -2
4x - 3y = 18
x = 3
y = -2
−9x−6y=15
9x−10y=145
x=5
y=-10
y = 1/2x - 1
y = 2x + 2
(-2, -2)
A number subtracted by 21 is 1/5 of that number added by 3
27
-3x - 3y = -3
-3x - 2y = 1
x = -3
y = 4
-3x + 3y = 4
-x + y = 3
No Solution
11x+4y=−46
28x−16y=40
x= -2
y= -6
x + 7y = 0
2x – 8y = 22
(7, -1)
Ari and Rizky are selling concert tickets. Ari sold 5 adult tickets and 3 child tickets for $100. Meanwhile, Rizky sold 10 adult tickets and 10 child tickets for $240. What is the price for each tickets?
adult = 14
Child = 10
6x - 9y = 30
2x - 3y = 10
Infinite
2x = 2y
2x + y = 6
x = 2
y = 2
−3y+5x=26
−6y−15x=−48
x= 4
y= -2
7x + 4y = 24
4x – 4y = 0
(-8, -8)
Bambang sold 9 cats and 12 dogs for $87. Meanwhile, Pamungkas sold 3 cats and 4 dogs for $29. How much does each dog and cat cost?
Infinite
Sultanto bought 7 ipads and 11 macbooks for $100. Meanwhile, Asep bought 12 ipads and 1 macbook for $100. How much does 1 ipad and 1 macbook cost?
The answer is $12
Ipad = 8
Mac = 4
6x + 6y = -6
5x + y = -13
x = -3
y = 2
6x+9y=60
-4x+2y=8
y=6
x=1
4x + y = 2
x – y = 3
(1, -2)
Radit bought 4 games and 5 toys for $120. Meanwhile, Sulaiman bought 7 games and 8 toys for $201. What is the cost for each game and toy?
Games = $15
Toys = $12
a number divided by 3 is 1/6 of the number added by 12. What is the number?
12