Substitution
y = -2
4x - 3y = 18
(3, -2)
−3x − 3y = 3
y = −5x − 17
(−4, 3)
-x + y = 7
x + y = 1
(-3, 4)
x + y = 2
-3x + 4y = 15
( 1 , -3 )
2x + y = 20
6x − 5y = 12
Substitution, solve for y in the first equation. Elimination, multiply the first equation by 5 or 3.
(7, 6)
y = 5x + 1
y = -4x 10
(1,6)
−5x + y = −2
−3x + 6y = −12
(0, -2)
-4x + 5y = 17
4x + 6y = -6
(-3 , 1 )
2x + 5y = 11
4x + 3y = 1
( -2 , 3 )
−2x − y = −9
5x − 2y = 18
Substitution, solve for y in the first equation. Elimination, multiply the first equation by 2.
(4, 1)
y = 6x - 11
-2x - 3y = -7
(2,1)
5x - y = 5
-x + 3y = 13
(2,5)
a + 4b = -4
a + 10b = -16
( 4 , -2 )
12x - 3y = -3
6x + y = 1
( 0 , 1 )
−5x − 8y = 17
2x − 7y = −17
Elimination, multiply equations to find common multiple.
-4x + y = 6
-5x - y = 21
(-3, -6)
−7x − 2y = −13
x − 2y = 11
(3,-4)
2x + y = -8
x - y = 2
( -2 , -4 )
16x − 10y = 10
−8x − 6y = 6
(0, -1)
x + 3y = 1
−3x − 3y = −15
Elimination (add)
(7, −2)
y = -10x - 0.5
-50x - 10y = 105
(2, -41/2) or (2, -20.5)
−3x − 4y = 2
3x + 3y = −3
(-2,1)
16x − 10y = 10
−8x − 6y = 6
(0, -1)
3x − 2y = 2
5x − 5y = 10
( -2 , -4 )
−5x + y = −2
−3x + 6y = −12
Substitution, solve for y in the first equation. Elimination, multiply the first equation by 6.
(0, −2)