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23 votes
Solve by substitution or elimination
4X – 3y = 7
4x + y = 11

User Isotopp
by
4.4k points

1 Answer

7 votes

Answer:

(5/2 , 1)

Explanation:

4X – 3y = 7

4x + y = 11

———————

Multiply a -1 to the bottom equation to get the 4x as a negative so it cancels out.

4x - 3y = 7

-4x - y = -11

——————

-4y = -4

Divide by -4

y = 1

Substitute the value of y into one of the equations and solve

4x - 3(1) = 7

4x -3 = 7

4x = 10

Divide by 4

X = 10/4

Simplify by dividing by 2

x = 5/2

Therefore the answer is (5/2, 1 )

User Skrilled
by
4.3k points