1.
solve each system using substitution. 5x + 4y = 5 and y = 5x

(0.2, 1)

(1, 0.2)

(2,1)
2.
solve each system using substitution. 6m - 2n = 7 and 3m + n = 4

(0.25, 1.5)

(1.25, 0.25)

(0.25 and 1.25)
3.
solve using elimination. -6x + 5y = 4 and 3x + 4y = 11

(1, 2)

(4, 11)

(1, 0-)