Question

Use the substitution method to solve the system of equations.

3x + 4y = 10
y = x-1
A. (2,3)
B. (2,1)
C. (3,2)
D. (1,2)

Answer 1

B

Explanation:

3x + 4(x-1) = 10

3x+4x-4=10

7x-4=10

+4 +4

7x=14

/7 /7

x=2

y=(2)-1

y=1