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A system of equations is shown below.

What is the value of y for the solution to the system? [2z - y = 3
(エー3y=4
A.2
B.1
c.-1
D.-5

A system of equations is shown below. What is the value of y for the solution to the-example-1

1 Answer

4 votes

Answer:

option c

y = -1

Explanation:

2x - y = 3 -----------------(1)

x - 3y = 4 ------------------(2)

from equation (2)

x = 4 + 3y-------------------(3)

substituting the value of x in equation (1)

2(4+3y) - y = 3

8 + 6y - y = 3

5y = 3-8

5y = -5

y = -1

substituting the value of y in equation (3)

x = 4 - 3

x = 1

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