Question

Use substitution to find the x-coordinate of the solution to each system.

7) -x + 5y = 19
y=-2x + 6
A-2 B) 2
C) 1 D) -1
8) -8x + 5y = -20
y=-3x + 19
A) -6 B) -4
C) 4 D) 5
9) 4x - 6y= 12
y = -2x - 10
A) 3
B) 7
C) Infinite number of solutions
D) -3
10) y = x + 10
| 3x - y=-18
A) 4 B)-6
C) 8 D) -8

Answer 1

Answer: (7) x = 1

(8) x = 5

(9) x = -3

(10) x = -4

Explanation: